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<header> <nav aria-label="Breadcrumb"> <p><a href="/Sandboxes/johnnyphung/chem101/01:_Chapter_Notes/Chap_09#">Chemistry 101: General Chemistry I</a> > <a href="/Sandboxes/johnnyphung/chem101/01:_Chapter_Notes/Chap_09#">Chapter Notes</a></p> </nav> <h1>Chap 09</h1> </header> <main role="main"> <div id="preview" class="preview scrollEditor"> <div id="container-ruller"></div> <div id="preview-content"> <h2 type="section" data-unnumbered="true" id="chemical-bonding" class="section-title"> CHEMICAL BONDING</h2> <ul> <li>Chemical bonds are strong attractive force that exist between the atoms of a substance. Chemical bonds are commonly classified into 3 types:</li> </ul> <h2 type="section" data-unnumbered="true" id="ionic-bonding" class="section-title"> Ionic Bonding</h2> <ul> <li>Ionic bonds form between metals and nonmetals.</li> <li>Ionic bonds form by transfer of electrons (metals have low IEs and nonmetals have negative EAs).</li> <li>Ionic bonds are formed by the electrostatic attraction of cation and anion, lowering their overall potential energy (Coulomb's law).<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-01.jpg?height=394&width=373&top_left_y=502&top_left_x=1546" alt="" data-align="center" /></figure></li> </ul> <h2 type="section" data-unnumbered="true" id="covalent-bonding" class="section-title"> Covalent Bonding</h2> <ul> <li>Covalent bonds form between two nonmetals.</li> <li>Covalent bonds form by sharing of electrons (nonmetals have high IEs).</li> <li>The shared electrons interact with nuclei of both of the bonding atoms, lower their potential energy (Coulomb's law).<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-01.jpg?height=351&width=336&top_left_y=988&top_left_x=1551" alt="" data-align="center" /></figure><br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-01.jpg?height=240&width=276&top_left_y=1357&top_left_x=491" alt="" data-align="center" /></figure><br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-01.jpg?height=235&width=359&top_left_y=1340&top_left_x=958" alt="" data-align="center" /></figure><br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-01.jpg?height=215&width=332&top_left_y=1362&top_left_x=1518" alt="" data-align="center" /></figure></li> </ul> <h2 type="section" data-unnumbered="true" id="metallic-bonding" class="section-title"> Metallic Bonding</h2> <ul> <li>Metallic bonds form between metallic ions</li> <li>Bonds are formed through "non-localized" pooling of electrons commonly referred to as "sea of electrons".<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-01.jpg?height=347&width=430&top_left_y=1684&top_left_x=1491" alt="" data-align="center" /></figure></li> </ul> <h2 type="section" data-unnumbered="true" id="lewis-structures" class="section-title"> LEWIS STRUCTURES</h2> <ul> <li>The valence electrons in an atom are the electrons in the outer most principal shell. Since these are the most important electrons in bonding, they are most focused upon.</li> <li>Lewis structures use Lewis symbols to show valence electrons of main-group elements as dots surrounding the symbol of the atom.</li> <li>For example, the electron configuration and Lewis structure of oxygen are shown below:<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-02.jpg?height=201&width=313&top_left_y=777&top_left_x=618" alt="" data-align="center" /></figure><br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-02.jpg?height=141&width=523&top_left_y=794&top_left_x=1112" alt="" data-align="center" /></figure></li> <li>The Lewis structures for all main-group elements in the first 3 periods are shown below:</li> </ul> <div class="table" number="1"> <div class="figure_img" style="text-align: center;"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-02.jpg?height=512&width=1073&top_left_y=1089&top_left_x=558" alt="" style="max-width: 100%;" /></div><div class="caption_figure">Lewis symbols for the first 3 periods of Main-Group Elements</div></div> <ul> <li>Lewis symbols provide a simple way to visualize the number of valence electrons in a maingroup element. Note that the elements with eight valence electrons are particularly stable because they have a full outer shell.</li> <li>The tendency of atoms in bonding to gain eight electrons in their outer shell and become stable is called the octet rule. Helium is an exception to this rule, since it only has two electrons in its outer level (duet).</li> </ul> <h2 type="section" data-unnumbered="true" id="lewis-structures-for-ionic-compounds" class="section-title"> LEWIS STRUCTURES FOR IONIC COMPOUNDS</h2> <ul> <li>Ionic bonds are formed by transfer of electrons from a metal to a non-metal. Therefore, the Lewis structure for these compounds is drawn by moving the electrons from metal to non-metal.</li> <li>For example, the Lewis structure for potassium chloride is written as shown below:</li> </ul> <div><span class="math-block "> <mjx-container class="MathJax" jax="SVG" display="true"><svg style="vertical-align: -0.566ex;" width="22.789ex" height="2.885ex" role="img" focusable="false" viewbox="0 -1025 10072.9 1275"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4B" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H313Q235 637 233 620Q232 618 232 462L233 307L379 449Q425 494 479 546Q518 584 524 591T531 607V608Q531 630 503 636Q501 636 498 636T493 637H489V683H499Q517 680 630 680Q704 680 716 683H722V637H708Q633 633 589 597Q584 592 495 506T406 419T515 254T631 80Q644 60 662 54T715 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250Z"></path></g></g></g></g></g></svg></mjx-container></span></div> <div>Note that:</div> <ul> <li>The transfer of electron gives chlorine an octet and leaves potassium with an octet from the previous principal shell, which is now the valence shell.</li> </ul> <div><span class="math-block "> <mjx-container class="MathJax" jax="SVG" display="true"><svg style="vertical-align: -4.68ex;" width="28.98ex" height="10.491ex" role="img" focusable="false" viewbox="0 -2568.4 12809.1 4636.9"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mtable"><g data-mml-node="mtr" transform="translate(0,1734.5)"><g data-mml-node="mtd"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4B" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H313Q235 637 233 620Q232 618 232 462L233 307L379 449Q425 494 479 546Q518 584 524 591T531 607V608Q531 630 503 636Q501 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transform="translate(7926,0)"></path><path data-c="65" d="M28 218Q28 273 48 318T98 391T163 433T229 448Q282 448 320 430T378 380T406 316T415 245Q415 238 408 231H126V216Q126 68 226 36Q246 30 270 30Q312 30 342 62Q359 79 369 104L379 128Q382 131 395 131H398Q415 131 415 121Q415 117 412 108Q393 53 349 21T250 -11Q155 -11 92 58T28 218ZM333 275Q322 403 238 411H236Q228 411 220 410T195 402T166 381T143 340T127 274V267H333V275Z" transform="translate(8204,0)"></path><path data-c="76" d="M338 431Q344 429 422 429Q479 429 503 431H508V385H497Q439 381 423 345Q421 341 356 172T288 -2Q283 -11 263 -11Q244 -11 239 -2Q99 359 98 364Q93 378 82 381T43 385H19V431H25L33 430Q41 430 53 430T79 430T104 429T122 428Q217 428 232 431H240V385H226Q187 384 184 370Q184 366 235 234L286 102L377 341V349Q377 363 367 372T349 383T335 385H331V431H338Z" transform="translate(8648,0)"></path><path data-c="65" d="M28 218Q28 273 48 318T98 391T163 433T229 448Q282 448 320 430T378 380T406 316T415 245Q415 238 408 231H126V216Q126 68 226 36Q246 30 270 30Q312 30 342 62Q359 79 369 104L379 128Q382 131 395 131H398Q415 131 415 121Q415 117 412 108Q393 53 349 21T250 -11Q155 -11 92 58T28 218ZM333 275Q322 403 238 411H236Q228 411 220 410T195 402T166 381T143 340T127 274V267H333V275Z" transform="translate(9176,0)"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(9620,0)"></path><path data-c="A0" d="" transform="translate(9898,0)"></path></g></g></g></g></g></g></svg></mjx-container></span></div> <ul> <li>Potassium becomes positively charged because it loses an electron and chlorine becomes negatively charged because it gains an electron.</li> <li>The Lewis structure of the anion is usually written within brackets with the charge written outside the brackets. The positive and negative charges attract one another , forming the ionic bond in KCl .</li> <li>Lewis structures can be used to predict the correct formula for ionic compounds. Examples below show how these formulas can be predicted.</li> </ul> <h2 type="section" data-unnumbered="true" id="examples%3A" class="section-title"> Examples:</h2> <div>Use Lewis symbols to predict the formula for the compound that forms between each pair of elements:</div> <ol> <li>Calcium and chlorine</li> <li>Aluminum and oxygen</li> </ol> <h2 type="section" data-unnumbered="true" id="lattice-energy" class="section-title"> LATTICE ENERGY</h2> <ul> <li>The formation of an ionic compound from its constituent elements is usually very exothermic. 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306T287 378Q287 403 287 429T287 479T287 524T286 563T286 593T286 614V621Q281 630 263 633T182 637H154V683H166Q187 680 332 680Q439 680 457 683H465V637H449Q422 637 401 634Q393 631 389 623Q388 621 388 376T387 123Q377 61 322 20T194 -22Q188 -22 177 -21T160 -20Q96 -9 61 29T25 110Q25 144 44 160T89 177Z" transform="translate(528,0)"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(21509.7,0)"><g data-mml-node="mo"><path data-c="2F" d="M423 750Q432 750 438 744T444 730Q444 725 271 248T92 -240Q85 -250 75 -250Q68 -250 62 -245T56 -231Q56 -221 230 257T407 740Q411 750 423 750Z"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(22009.7,0)"><g data-mml-node="mi"><path data-c="6D" d="M41 46H55Q94 46 102 60V68Q102 77 102 91T102 122T103 161T103 203Q103 234 103 269T102 328V351Q99 370 88 376T43 385H25V408Q25 431 27 431L37 432Q47 433 65 434T102 436Q119 437 138 438T167 441T178 442H181V402Q181 364 182 364T187 369T199 384T218 402T247 421T285 437Q305 442 336 442Q351 442 364 440T387 434T406 426T421 417T432 406T441 395T448 384T452 374T455 366L457 361L460 365Q463 369 466 373T475 384T488 397T503 410T523 422T546 432T572 439T603 442Q729 442 740 329Q741 322 741 190V104Q741 66 743 59T754 49Q775 46 803 46H819V0H811L788 1Q764 2 737 2T699 3Q596 3 587 0H579V46H595Q656 46 656 62Q657 64 657 200Q656 335 655 343Q649 371 635 385T611 402T585 404Q540 404 506 370Q479 343 472 315T464 232V168V108Q464 78 465 68T468 55T477 49Q498 46 526 46H542V0H534L510 1Q487 2 460 2T422 3Q319 3 310 0H302V46H318Q379 46 379 62Q380 64 380 200Q379 335 378 343Q372 371 358 385T334 402T308 404Q263 404 229 370Q202 343 195 315T187 232V168V108Q187 78 188 68T191 55T200 49Q221 46 249 46H265V0H257L234 1Q210 2 183 2T145 3Q42 3 33 0H25V46H41Z"></path><path data-c="6F" d="M28 214Q28 309 93 378T250 448Q340 448 405 380T471 215Q471 120 407 55T250 -10Q153 -10 91 57T28 214ZM250 30Q372 30 372 193V225V250Q372 272 371 288T364 326T348 362T317 390T268 410Q263 411 252 411Q222 411 195 399Q152 377 139 338T126 246V226Q126 130 145 91Q177 30 250 30Z" transform="translate(833,0)"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(1333,0)"></path></g></g></g></g></svg></mjx-container></span></div> <ul> <li>Where does this energy come from? The transfer of electron from sodium to chlorine absorbs energy. Recall that the <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="3.345ex" height="1.885ex" role="img" focusable="false" viewbox="0 -683 1478.6 833"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="49" d="M328 0Q307 3 180 3T32 0H21V46H43Q92 46 106 49T126 60Q128 63 128 342Q128 620 126 623Q122 628 118 630T96 635T43 637H21V683H32Q53 680 180 680T328 683H339V637H317Q268 637 254 634T234 623Q232 620 232 342Q232 63 234 60Q238 55 242 53T264 48T317 46H339V0H328Z"></path><path data-c="45" d="M128 619Q121 626 117 628T101 631T58 634H25V680H597V676Q599 670 611 560T625 444V440H585V444Q584 447 582 465Q578 500 570 526T553 571T528 601T498 619T457 629T411 633T353 634Q266 634 251 633T233 622Q233 622 233 621Q232 619 232 497V376H286Q359 378 377 385Q413 401 416 469Q416 471 416 473V493H456V213H416V233Q415 268 408 288T383 317T349 328T297 330Q290 330 286 330H232V196V114Q232 57 237 52Q243 47 289 47H340H391Q428 47 452 50T505 62T552 92T584 146Q594 172 599 200T607 247T612 270V273H652V270Q651 267 632 137T610 3V0H25V46H58Q100 47 109 49T128 61V619Z" transform="translate(361,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1075,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="31" d="M213 578L200 573Q186 568 160 563T102 556H83V602H102Q149 604 189 617T245 641T273 663Q275 666 285 666Q294 666 302 660V361L303 61Q310 54 315 52T339 48T401 46H427V0H416Q395 3 257 3Q121 3 100 0H88V46H114Q136 46 152 46T177 47T193 50T201 52T207 57T213 61V578Z"></path></g></g></g></g></g></svg></mjx-container></span> for Na is <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.566ex;" width="12.853ex" height="2.262ex" role="img" focusable="false" viewbox="0 -750 5681 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mo"><path data-c="2B" d="M56 237T56 250T70 270H369V420L370 570Q380 583 389 583Q402 583 409 568V270H707Q722 262 722 250T707 230H409V-68Q401 -82 391 -82H389H387Q375 -82 369 -68V230H70Q56 237 56 250Z"></path></g><g data-mml-node="mn" transform="translate(778,0)"><path data-c="34" d="M462 0Q444 3 333 3Q217 3 199 0H190V46H221Q241 46 248 46T265 48T279 53T286 61Q287 63 287 115V165H28V211L179 442Q332 674 334 675Q336 677 355 677H373L379 671V211H471V165H379V114Q379 73 379 66T385 54Q393 47 442 46H471V0H462ZM293 211V545L74 212L183 211H293Z"></path><path data-c="39" d="M352 287Q304 211 232 211Q154 211 104 270T44 396Q42 412 42 436V444Q42 537 111 606Q171 666 243 666Q245 666 249 666T257 665H261Q273 665 286 663T323 651T370 619T413 560Q456 472 456 334Q456 194 396 97Q361 41 312 10T208 -22Q147 -22 108 7T68 93T121 149Q143 149 158 135T173 96Q173 78 164 65T148 49T135 44L131 43Q131 41 138 37T164 27T206 22H212Q272 22 313 86Q352 142 352 280V287ZM244 248Q292 248 321 297T351 430Q351 508 343 542Q341 552 337 562T323 588T293 615T246 625Q208 625 181 598Q160 576 154 546T147 441Q147 358 152 329T172 282Q197 248 244 248Z" transform="translate(500,0)"></path><path data-c="36" d="M42 313Q42 476 123 571T303 666Q372 666 402 630T432 550Q432 525 418 510T379 495Q356 495 341 509T326 548Q326 592 373 601Q351 623 311 626Q240 626 194 566Q147 500 147 364L148 360Q153 366 156 373Q197 433 263 433H267Q313 433 348 414Q372 400 396 374T435 317Q456 268 456 210V192Q456 169 451 149Q440 90 387 34T253 -22Q225 -22 199 -14T143 16T92 75T56 172T42 313ZM257 397Q227 397 205 380T171 335T154 278T148 216Q148 133 160 97T198 39Q222 21 251 21Q302 21 329 59Q342 77 347 104T352 209Q352 289 347 316T329 361Q302 397 257 397Z" transform="translate(1000,0)"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2278,0)"><g data-mml-node="mtext"><path data-c="A0" d=""></path></g><g data-mml-node="mi" transform="translate(250,0)"><path data-c="6B" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T97 124T98 167T98 217T98 272T98 329Q98 366 98 407T98 482T98 542T97 586T97 603Q94 622 83 628T38 637H20V660Q20 683 22 683L32 684Q42 685 61 686T98 688Q115 689 135 690T165 693T176 694H179V463L180 233L240 287Q300 341 304 347Q310 356 310 364Q310 383 289 385H284V431H293Q308 428 412 428Q475 428 484 431H489V385H476Q407 380 360 341Q286 278 286 274Q286 273 349 181T420 79Q434 60 451 53T500 46H511V0H505Q496 3 418 3Q322 3 307 0H299V46H306Q330 48 330 65Q330 72 326 79Q323 84 276 153T228 222L176 176V120V84Q176 65 178 59T189 49Q210 46 238 46H254V0H246Q231 3 137 3T28 0H20V46H36Z"></path><path data-c="4A" d="M89 177Q115 177 133 160T152 112Q152 88 137 72T102 52Q99 51 101 49Q106 43 129 29Q159 15 190 15Q232 15 256 48T286 126Q286 127 286 142T286 183T286 238T287 306T287 378Q287 403 287 429T287 479T287 524T286 563T286 593T286 614V621Q281 630 263 633T182 637H154V683H166Q187 680 332 680Q439 680 457 683H465V637H449Q422 637 401 634Q393 631 389 623Q388 621 388 376T387 123Q377 61 322 20T194 -22Q188 -22 177 -21T160 -20Q96 -9 61 29T25 110Q25 144 44 160T89 177Z" transform="translate(528,0)"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(3570,0)"><g data-mml-node="mo"><path data-c="2F" d="M423 750Q432 750 438 744T444 730Q444 725 271 248T92 -240Q85 -250 75 -250Q68 -250 62 -245T56 -231Q56 -221 230 257T407 740Q411 750 423 750Z"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(4070,0)"><g data-mml-node="mi"><path data-c="6D" d="M41 46H55Q94 46 102 60V68Q102 77 102 91T102 122T103 161T103 203Q103 234 103 269T102 328V351Q99 370 88 376T43 385H25V408Q25 431 27 431L37 432Q47 433 65 434T102 436Q119 437 138 438T167 441T178 442H181V402Q181 364 182 364T187 369T199 384T218 402T247 421T285 437Q305 442 336 442Q351 442 364 440T387 434T406 426T421 417T432 406T441 395T448 384T452 374T455 366L457 361L460 365Q463 369 466 373T475 384T488 397T503 410T523 422T546 432T572 439T603 442Q729 442 740 329Q741 322 741 190V104Q741 66 743 59T754 49Q775 46 803 46H819V0H811L788 1Q764 2 737 2T699 3Q596 3 587 0H579V46H595Q656 46 656 62Q657 64 657 200Q656 335 655 343Q649 371 635 385T611 402T585 404Q540 404 506 370Q479 343 472 315T464 232V168V108Q464 78 465 68T468 55T477 49Q498 46 526 46H542V0H534L510 1Q487 2 460 2T422 3Q319 3 310 0H302V46H318Q379 46 379 62Q380 64 380 200Q379 335 378 343Q372 371 358 385T334 402T308 404Q263 404 229 370Q202 343 195 315T187 232V168V108Q187 78 188 68T191 55T200 49Q221 46 249 46H265V0H257L234 1Q210 2 183 2T145 3Q42 3 33 0H25V46H41Z"></path><path data-c="6F" d="M28 214Q28 309 93 378T250 448Q340 448 405 380T471 215Q471 120 407 55T250 -10Q153 -10 91 57T28 214ZM250 30Q372 30 372 193V225V250Q372 272 371 288T364 326T348 362T317 390T268 410Q263 411 252 411Q222 411 195 399Q152 377 139 338T126 246V226Q126 130 145 91Q177 30 250 30Z" transform="translate(833,0)"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(1333,0)"></path></g></g></g></g></svg></mjx-container></span> and the EA for Cl is only -349 <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.566ex;" width="7.133ex" height="2.262ex" role="img" focusable="false" viewbox="0 -750 3153 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="6B" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T97 124T98 167T98 217T98 272T98 329Q98 366 98 407T98 482T98 542T97 586T97 603Q94 622 83 628T38 637H20V660Q20 683 22 683L32 684Q42 685 61 686T98 688Q115 689 135 690T165 693T176 694H179V463L180 233L240 287Q300 341 304 347Q310 356 310 364Q310 383 289 385H284V431H293Q308 428 412 428Q475 428 484 431H489V385H476Q407 380 360 341Q286 278 286 274Q286 273 349 181T420 79Q434 60 451 53T500 46H511V0H505Q496 3 418 3Q322 3 307 0H299V46H306Q330 48 330 65Q330 72 326 79Q323 84 276 153T228 222L176 176V120V84Q176 65 178 59T189 49Q210 46 238 46H254V0H246Q231 3 137 3T28 0H20V46H36Z"></path><path data-c="4A" d="M89 177Q115 177 133 160T152 112Q152 88 137 72T102 52Q99 51 101 49Q106 43 129 29Q159 15 190 15Q232 15 256 48T286 126Q286 127 286 142T286 183T286 238T287 306T287 378Q287 403 287 429T287 479T287 524T286 563T286 593T286 614V621Q281 630 263 633T182 637H154V683H166Q187 680 332 680Q439 680 457 683H465V637H449Q422 637 401 634Q393 631 389 623Q388 621 388 376T387 123Q377 61 322 20T194 -22Q188 -22 177 -21T160 -20Q96 -9 61 29T25 110Q25 144 44 160T89 177Z" transform="translate(528,0)"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1042,0)"><g data-mml-node="mo"><path data-c="2F" d="M423 750Q432 750 438 744T444 730Q444 725 271 248T92 -240Q85 -250 75 -250Q68 -250 62 -245T56 -231Q56 -221 230 257T407 740Q411 750 423 750Z"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1542,0)"><g data-mml-node="mi"><path data-c="6D" d="M41 46H55Q94 46 102 60V68Q102 77 102 91T102 122T103 161T103 203Q103 234 103 269T102 328V351Q99 370 88 376T43 385H25V408Q25 431 27 431L37 432Q47 433 65 434T102 436Q119 437 138 438T167 441T178 442H181V402Q181 364 182 364T187 369T199 384T218 402T247 421T285 437Q305 442 336 442Q351 442 364 440T387 434T406 426T421 417T432 406T441 395T448 384T452 374T455 366L457 361L460 365Q463 369 466 373T475 384T488 397T503 410T523 422T546 432T572 439T603 442Q729 442 740 329Q741 322 741 190V104Q741 66 743 59T754 49Q775 46 803 46H819V0H811L788 1Q764 2 737 2T699 3Q596 3 587 0H579V46H595Q656 46 656 62Q657 64 657 200Q656 335 655 343Q649 371 635 385T611 402T585 404Q540 404 506 370Q479 343 472 315T464 232V168V108Q464 78 465 68T468 55T477 49Q498 46 526 46H542V0H534L510 1Q487 2 460 2T422 3Q319 3 310 0H302V46H318Q379 46 379 62Q380 64 380 200Q379 335 378 343Q372 371 358 385T334 402T308 404Q263 404 229 370Q202 343 195 315T187 232V168V108Q187 78 188 68T191 55T200 49Q221 46 249 46H265V0H257L234 1Q210 2 183 2T145 3Q42 3 33 0H25V46H41Z"></path><path data-c="6F" d="M28 214Q28 309 93 378T250 448Q340 448 405 380T471 215Q471 120 407 55T250 -10Q153 -10 91 57T28 214ZM250 30Q372 30 372 193V225V250Q372 272 371 288T364 326T348 362T317 390T268 410Q263 411 252 411Q222 411 195 399Q152 377 139 338T126 246V226Q126 130 145 91Q177 30 250 30Z" transform="translate(833,0)"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 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Based on these energies, the reaction should be endothermic.</li> <li>The answer lies in lattice energy-the energy associated with formation of a crystalline lattice from the gaseous ions.<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-04.jpg?height=534&width=774&top_left_y=614&top_left_x=1233" alt="" data-align="center" /></figure></li> <li>To better understand the energetics of ionic bond formation, a hypothetical series of steps is created to represent the formation of an ionic compound from its constituent elements (the Born-Haber cycle). This cycle for the formation of NaCl is shown below:<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-04.jpg?height=1071&width=978&top_left_y=1415&top_left_x=627" alt="" data-align="center" /></figure></li> </ul> <h2 type="section" data-unnumbered="true" id="lattice-energy-2" class="section-title"> LATTICE ENERGY</h2> <ul> <li>Using the Born-Haber cycle for NaCl, the lattice energy for the formation of NaCl crystals can be summarized as:</li> </ul> <div><span class="math-block "> <mjx-container class="MathJax" jax="SVG" display="true"><svg style="vertical-align: -0.869ex;" width="57.757ex" height="2.514ex" role="img" focusable="false" viewbox="0 -727 25528.4 1111.1"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="394" d="M51 0Q46 4 46 7Q46 9 215 357T388 709Q391 716 416 716Q439 716 444 709Q447 705 616 357T786 7Q786 4 781 0H51ZM507 344L384 596L137 92L383 91H630Q630 93 507 344Z"></path></g><g data-mml-node="msubsup" transform="translate(833,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,413) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mo"><path data-c="2218" d="M55 251Q55 328 112 386T249 444T386 388T444 249Q444 171 388 113T250 55Q170 55 113 112T55 251ZM245 403Q188 403 142 361T96 250Q96 183 141 140T250 96Q284 96 313 109T354 135T375 160Q403 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-11 190 33L182 40V-45V-101Q182 -128 184 -134T195 -145Q216 -148 244 -148H260V-194H252L228 -193Q205 -192 178 -192T140 -191Q37 -191 28 -194H20V-148H36ZM424 218Q424 292 390 347T305 402Q234 402 182 337V98Q222 26 294 26Q345 26 384 80T424 218Z" transform="translate(1227,0)"></path><path data-c="A0" d="" transform="translate(1783,0)"></path></g><g data-mml-node="mn" transform="translate(2033,0)"><path data-c="33" d="M127 463Q100 463 85 480T69 524Q69 579 117 622T233 665Q268 665 277 664Q351 652 390 611T430 522Q430 470 396 421T302 350L299 348Q299 347 308 345T337 336T375 315Q457 262 457 175Q457 96 395 37T238 -22Q158 -22 100 21T42 130Q42 158 60 175T105 193Q133 193 151 175T169 130Q169 119 166 110T159 94T148 82T136 74T126 70T118 67L114 66Q165 21 238 21Q293 21 321 74Q338 107 338 175V195Q338 290 274 322Q259 328 213 329L171 330L168 332Q166 335 166 348Q166 366 174 366Q202 366 232 371Q266 376 294 413T322 525V533Q322 590 287 612Q265 626 240 626Q208 626 181 615T143 592T132 580H135Q138 579 143 578T153 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639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,413) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mo"><path data-c="2218" d="M55 251Q55 328 112 386T249 444T386 388T444 249Q444 171 388 113T250 55Q170 55 113 112T55 251ZM245 403Q188 403 142 361T96 250Q96 183 141 140T250 96Q284 96 313 109T354 135T375 160Q403 197 403 250Q403 313 360 358T245 403Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-247) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mtext"><path data-c="73" d="M295 316Q295 356 268 385T190 414Q154 414 128 401Q98 382 98 349Q97 344 98 336T114 312T157 287Q175 282 201 278T245 269T277 256Q294 248 310 236T342 195T359 133Q359 71 321 31T198 -10H190Q138 -10 94 26L86 19L77 10Q71 4 65 -1L54 -11H46H42Q39 -11 33 -5V74V132Q33 153 35 157T45 162H54Q66 162 70 158T75 146T82 119T101 77Q136 26 198 26Q295 26 295 104Q295 133 277 151Q257 175 194 187T111 210Q75 227 54 256T33 318Q33 357 50 384T93 424T143 442T187 447H198Q238 447 268 432L283 424L292 431Q302 440 314 448H322H326Q329 448 335 442V310L329 304H301Q295 310 295 316Z"></path><path data-c="74" d="M27 422Q80 426 109 478T141 600V615H181V431H316V385H181V241Q182 116 182 100T189 68Q203 29 238 29Q282 29 292 100Q293 108 293 146V181H333V146V134Q333 57 291 17Q264 -10 221 -10Q187 -10 162 2T124 33T105 68T98 100Q97 107 97 248V385H18V422H27Z" transform="translate(394,0)"></path><path data-c="65" d="M28 218Q28 273 48 318T98 391T163 433T229 448Q282 448 320 430T378 380T406 316T415 245Q415 238 408 231H126V216Q126 68 226 36Q246 30 270 30Q312 30 342 62Q359 79 369 104L379 128Q382 131 395 131H398Q415 131 415 121Q415 117 412 108Q393 53 349 21T250 -11Q155 -11 92 58T28 218ZM333 275Q322 403 238 411H236Q228 411 220 410T195 402T166 381T143 340T127 274V267H333V275Z" transform="translate(783,0)"></path><path data-c="70" d="M36 -148H50Q89 -148 97 -134V-126Q97 -119 97 -107T97 -77T98 -38T98 6T98 55T98 106Q98 140 98 177T98 243T98 296T97 335T97 351Q94 370 83 376T38 385H20V408Q20 431 22 431L32 432Q42 433 61 434T98 436Q115 437 135 438T165 441T176 442H179V416L180 390L188 397Q247 441 326 441Q407 441 464 377T522 216Q522 115 457 52T310 -11Q242 -11 190 33L182 40V-45V-101Q182 -128 184 -134T195 -145Q216 -148 244 -148H260V-194H252L228 -193Q205 -192 178 -192T140 -191Q37 -191 28 -194H20V-148H36ZM424 218Q424 292 390 347T305 402Q234 402 182 337V98Q222 26 294 26Q345 26 384 80T424 218Z" transform="translate(1227,0)"></path><path data-c="A0" d="" transform="translate(1783,0)"></path></g><g data-mml-node="mn" transform="translate(2033,0)"><path data-c="34" d="M462 0Q444 3 333 3Q217 3 199 0H190V46H221Q241 46 248 46T265 48T279 53T286 61Q287 63 287 115V165H28V211L179 442Q332 674 334 675Q336 677 355 677H373L379 671V211H471V165H379V114Q379 73 379 66T385 54Q393 47 442 46H471V0H462ZM293 211V545L74 212L183 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0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,413) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mo"><path data-c="2218" d="M55 251Q55 328 112 386T249 444T386 388T444 249Q444 171 388 113T250 55Q170 55 113 112T55 251ZM245 403Q188 403 142 361T96 250Q96 183 141 140T250 96Q284 96 313 109T354 135T375 160Q403 197 403 250Q403 313 360 358T245 403Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-247) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mtext"><path data-c="73" d="M295 316Q295 356 268 385T190 414Q154 414 128 401Q98 382 98 349Q97 344 98 336T114 312T157 287Q175 282 201 278T245 269T277 256Q294 248 310 236T342 195T359 133Q359 71 321 31T198 -10H190Q138 -10 94 26L86 19L77 10Q71 4 65 -1L54 -11H46H42Q39 -11 33 -5V74V132Q33 153 35 157T45 162H54Q66 162 70 158T75 146T82 119T101 77Q136 26 198 26Q295 26 295 104Q295 133 277 151Q257 175 194 187T111 210Q75 227 54 256T33 318Q33 357 50 384T93 424T143 442T187 447H198Q238 447 268 432L283 424L292 431Q302 440 314 448H322H326Q329 448 335 442V310L329 304H301Q295 310 295 316Z"></path><path data-c="74" d="M27 422Q80 426 109 478T141 600V615H181V431H316V385H181V241Q182 116 182 100T189 68Q203 29 238 29Q282 29 292 100Q293 108 293 146V181H333V146V134Q333 57 291 17Q264 -10 221 -10Q187 -10 162 2T124 33T105 68T98 100Q97 107 97 248V385H18V422H27Z" transform="translate(394,0)"></path><path data-c="65" d="M28 218Q28 273 48 318T98 391T163 433T229 448Q282 448 320 430T378 380T406 316T415 245Q415 238 408 231H126V216Q126 68 226 36Q246 30 270 30Q312 30 342 62Q359 79 369 104L379 128Q382 131 395 131H398Q415 131 415 121Q415 117 412 108Q393 53 349 21T250 -11Q155 -11 92 58T28 218ZM333 275Q322 403 238 411H236Q228 411 220 410T195 402T166 381T143 340T127 274V267H333V275Z" transform="translate(783,0)"></path><path data-c="70" d="M36 -148H50Q89 -148 97 -134V-126Q97 -119 97 -107T97 -77T98 -38T98 6T98 55T98 106Q98 140 98 177T98 243T98 296T97 335T97 351Q94 370 83 376T38 385H20V408Q20 431 22 431L32 432Q42 433 61 434T98 436Q115 437 135 438T165 441T176 442H179V416L180 390L188 397Q247 441 326 441Q407 441 464 377T522 216Q522 115 457 52T310 -11Q242 -11 190 33L182 40V-45V-101Q182 -128 184 -134T195 -145Q216 -148 244 -148H260V-194H252L228 -193Q205 -192 178 -192T140 -191Q37 -191 28 -194H20V-148H36ZM424 218Q424 292 390 347T305 402Q234 402 182 337V98Q222 26 294 26Q345 26 384 80T424 218Z" transform="translate(1227,0)"></path><path data-c="A0" d="" transform="translate(1783,0)"></path></g><g data-mml-node="mn" transform="translate(2033,0)"><path data-c="35" d="M164 157Q164 133 148 117T109 101H102Q148 22 224 22Q294 22 326 82Q345 115 345 210Q345 313 318 349Q292 382 260 382H254Q176 382 136 314Q132 307 129 306T114 304Q97 304 95 310Q93 314 93 485V614Q93 664 98 664Q100 666 102 666Q103 666 123 658T178 642T253 634Q324 634 389 662Q397 666 402 666Q410 666 410 648V635Q328 538 205 538Q174 538 149 544L139 546V374Q158 388 169 396T205 412T256 420Q337 420 393 355T449 201Q449 109 385 44T229 -22Q148 -22 99 32T50 154Q50 178 61 192T84 210T107 214Q132 214 148 197T164 157Z"></path></g></g></g></g></g></svg></mjx-container></span></div> <h2 type="section" data-unnumbered="true" id="lattice-energy-3" class="section-title"> lattice energy</h2> <div>Therefore,</div> <div><span class="math-block "> <mjx-container class="MathJax" jax="SVG" display="true"><svg style="vertical-align: -0.357ex;" width="20.605ex" height="2.002ex" role="img" focusable="false" viewbox="0 -727 9107.6 884.7"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="394" d="M51 0Q46 4 46 7Q46 9 215 357T388 709Q391 716 416 716Q439 716 444 709Q447 705 616 357T786 7Q786 4 781 0H51ZM507 344L384 596L137 92L383 91H630Q630 93 507 344Z"></path></g><g data-mml-node="msup" transform="translate(833,0)"><g 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359Q170 334 154 320ZM126 106Q126 75 150 51T209 26Q247 26 276 49T315 109Q317 116 318 175Q318 233 317 233Q309 233 296 232T251 223T193 203T147 166T126 106Z" transform="translate(278,0)"></path><path data-c="74" d="M27 422Q80 426 109 478T141 600V615H181V431H316V385H181V241Q182 116 182 100T189 68Q203 29 238 29Q282 29 292 100Q293 108 293 146V181H333V146V134Q333 57 291 17Q264 -10 221 -10Q187 -10 162 2T124 33T105 68T98 100Q97 107 97 248V385H18V422H27Z" transform="translate(778,0)"></path><path data-c="74" d="M27 422Q80 426 109 478T141 600V615H181V431H316V385H181V241Q182 116 182 100T189 68Q203 29 238 29Q282 29 292 100Q293 108 293 146V181H333V146V134Q333 57 291 17Q264 -10 221 -10Q187 -10 162 2T124 33T105 68T98 100Q97 107 97 248V385H18V422H27Z" transform="translate(1167,0)"></path><path data-c="69" d="M69 609Q69 637 87 653T131 669Q154 667 171 652T188 609Q188 579 171 564T129 549Q104 549 87 564T69 609ZM247 0Q232 3 143 3Q132 3 106 3T56 1L34 0H26V46H42Q70 46 91 49Q100 53 102 60T104 102V205V293Q104 345 102 359T88 378Q74 385 41 385H30V408Q30 431 32 431L42 432Q52 433 70 434T106 436Q123 437 142 438T171 441T182 442H185V62Q190 52 197 50T232 46H255V0H247Z" transform="translate(1556,0)"></path><path data-c="63" d="M370 305T349 305T313 320T297 358Q297 381 312 396Q317 401 317 402T307 404Q281 408 258 408Q209 408 178 376Q131 329 131 219Q131 137 162 90Q203 29 272 29Q313 29 338 55T374 117Q376 125 379 127T395 129H409Q415 123 415 120Q415 116 411 104T395 71T366 33T318 2T249 -11Q163 -11 99 53T34 214Q34 318 99 383T250 448T370 421T404 357Q404 334 387 320Z" transform="translate(1834,0)"></path><path data-c="65" d="M28 218Q28 273 48 318T98 391T163 433T229 448Q282 448 320 430T378 380T406 316T415 245Q415 238 408 231H126V216Q126 68 226 36Q246 30 270 30Q312 30 342 62Q359 79 369 104L379 128Q382 131 395 131H398Q415 131 415 121Q415 117 412 108Q393 53 349 21T250 -11Q155 -11 92 58T28 218ZM333 275Q322 403 238 411H236Q228 411 220 410T195 402T166 381T143 340T127 274V267H333V275Z" transform="translate(2278,0)"></path><path data-c="A0" d="" transform="translate(2722,0)"></path></g></g></g><g data-mml-node="mo" transform="translate(4481.9,0)"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347Q722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153Q722 140 707 133H70Q56 140 56 153Z"></path></g><g data-mml-node="mo" transform="translate(5537.6,0)"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="mn" transform="translate(6315.6,0)"><path data-c="37" d="M55 458Q56 460 72 567L88 674Q88 676 108 676H128V672Q128 662 143 655T195 646T364 644H485V605L417 512Q408 500 387 472T360 435T339 403T319 367T305 330T292 284T284 230T278 162T275 80Q275 66 275 52T274 28V19Q270 2 255 -10T221 -22Q210 -22 200 -19T179 0T168 40Q168 198 265 368Q285 400 349 489L395 552H302Q128 552 119 546Q113 543 108 522T98 479L95 458V455H55V458Z"></path><path data-c="38" d="M70 417T70 494T124 618T248 666Q319 666 374 624T429 515Q429 485 418 459T392 417T361 389T335 371T324 363L338 354Q352 344 366 334T382 323Q457 264 457 174Q457 95 399 37T249 -22Q159 -22 101 29T43 155Q43 263 172 335L154 348Q133 361 127 368Q70 417 70 494ZM286 386L292 390Q298 394 301 396T311 403T323 413T334 425T345 438T355 454T364 471T369 491T371 513Q371 556 342 586T275 624Q268 625 242 625Q201 625 165 599T128 534Q128 511 141 492T167 463T217 431Q224 426 228 424L286 386ZM250 21Q308 21 350 55T392 137Q392 154 387 169T375 194T353 216T330 234T301 253T274 270Q260 279 244 289T218 306L210 311Q204 311 181 294T133 239T107 157Q107 98 150 60T250 21Z" transform="translate(500,0)"></path><path data-c="38" d="M70 417T70 494T124 618T248 666Q319 666 374 624T429 515Q429 485 418 459T392 417T361 389T335 371T324 363L338 354Q352 344 366 334T382 323Q457 264 457 174Q457 95 399 37T249 -22Q159 -22 101 29T43 155Q43 263 172 335L154 348Q133 361 127 368Q70 417 70 494ZM286 386L292 390Q298 394 301 396T311 403T323 413T334 425T345 438T355 454T364 471T369 491T371 513Q371 556 342 586T275 624Q268 625 242 625Q201 625 165 599T128 534Q128 511 141 492T167 463T217 431Q224 426 228 424L286 386ZM250 21Q308 21 350 55T392 137Q392 154 387 169T375 194T353 216T330 234T301 253T274 270Q260 279 244 289T218 306L210 311Q204 311 181 294T133 239T107 157Q107 98 150 60T250 21Z" transform="translate(1000,0)"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(7815.6,0)"><g data-mml-node="mtext"><path data-c="A0" d=""></path></g><g data-mml-node="mi" transform="translate(250,0)"><path data-c="6B" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T97 124T98 167T98 217T98 272T98 329Q98 366 98 407T98 482T98 542T97 586T97 603Q94 622 83 628T38 637H20V660Q20 683 22 683L32 684Q42 685 61 686T98 688Q115 689 135 690T165 693T176 694H179V463L180 233L240 287Q300 341 304 347Q310 356 310 364Q310 383 289 385H284V431H293Q308 428 412 428Q475 428 484 431H489V385H476Q407 380 360 341Q286 278 286 274Q286 273 349 181T420 79Q434 60 451 53T500 46H511V0H505Q496 3 418 3Q322 3 307 0H299V46H306Q330 48 330 65Q330 72 326 79Q323 84 276 153T228 222L176 176V120V84Q176 65 178 59T189 49Q210 46 238 46H254V0H246Q231 3 137 3T28 0H20V46H36Z"></path><path data-c="4A" d="M89 177Q115 177 133 160T152 112Q152 88 137 72T102 52Q99 51 101 49Q106 43 129 29Q159 15 190 15Q232 15 256 48T286 126Q286 127 286 142T286 183T286 238T287 306T287 378Q287 403 287 429T287 479T287 524T286 563T286 593T286 614V621Q281 630 263 633T182 637H154V683H166Q187 680 332 680Q439 680 457 683H465V637H449Q422 637 401 634Q393 631 389 623Q388 621 388 376T387 123Q377 61 322 20T194 -22Q188 -22 177 -21T160 -20Q96 -9 61 29T25 110Q25 144 44 160T89 177Z" transform="translate(528,0)"></path></g></g></g></g></svg></mjx-container></span></div> <ul> <li>The value of lattice energy is a large negative number, which more than compensates for the endothermic nature of electron transfer we discussed earlier.</li> </ul> <h2 type="section" data-unnumbered="true" id="trends-in-lattice-energy%3A" class="section-title"> Trends in Lattice Energy:</h2> <ul> <li>The lattice energy of crystals are affected by two factors: ion size and ion charge.</li> <li>The lattice energy of several alkali metals chlorides are listed below:</li> </ul> <div class="table_tabular" style="text-align: center"> <div class="inline-tabular"><table class="tabular"> <tbody> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">Metal Chloride</td> <td style="text-align: center; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">Lattice Energy <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.566ex;" width="8.604ex" height="2.262ex" role="img" focusable="false" viewbox="0 -750 3803 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mtext"><path data-c="A0" d=""></path></g><g data-mml-node="mi" transform="translate(250,0)"><path data-c="1D424" d="M32 686L123 690Q214 694 215 694H221V255L377 382H346V444H355Q370 441 476 441Q544 441 556 444H562V382H476L347 277L515 62H587V0H579Q564 3 476 3Q370 3 352 0H343V62H358L373 63L260 206L237 189L216 172V62H285V0H277Q259 3 157 3Q46 3 37 0H29V62H98V332Q98 387 98 453T99 534Q99 593 97 605T83 620Q69 624 42 624H29V686H32Z"></path></g><g data-mml-node="mi" transform="translate(857,0)"><path data-c="1D409" d="M174 114Q174 96 169 82T159 63T144 47L155 45Q183 40 203 40Q271 40 290 104Q294 118 294 150T295 380V624H154V686H169Q196 683 365 683Q499 683 517 686H527V624H446V379Q446 183 446 153T441 108Q413 32 315 2Q266 -11 208 -11Q160 -11 118 -2T42 37T8 114V122Q8 150 30 174T91 198T152 174T174 122V114Z"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1451,0)"><g data-mml-node="mo"><path data-c="2F" d="M423 750Q432 750 438 744T444 730Q444 725 271 248T92 -240Q85 -250 75 -250Q68 -250 62 -245T56 -231Q56 -221 230 257T407 740Q411 750 423 750Z"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1951,0)"><g data-mml-node="mi"><path data-c="1D426" d="M40 442Q217 450 218 450H224V365Q226 367 235 378T254 397T278 416T314 435T362 448Q376 450 400 450H406Q503 450 534 393Q545 376 545 370Q545 368 555 379Q611 450 716 450Q774 450 809 434Q850 414 861 379T873 276V213V198V62H942V0H933Q915 3 809 3Q702 3 684 0H675V62H744V194V275Q744 348 735 373T690 399Q645 399 607 370T557 290Q555 281 554 171V62H623V0H614Q596 3 489 3Q374 3 365 0H356V62H425V194V275Q425 348 416 373T371 399Q326 399 288 370T238 290Q236 281 235 171V62H304V0H295Q277 3 171 3Q64 3 46 0H37V62H106V210V303Q106 353 104 363T91 376Q77 380 50 380H37V442H40Z"></path></g><g data-mml-node="mi" transform="translate(958,0)"><path data-c="1D428" d="M287 -5Q228 -5 182 10T109 48T63 102T39 161T32 219Q32 272 50 314T94 382T154 423T214 446T265 452H279Q319 452 326 451Q428 439 485 376T542 221Q542 156 514 108T442 33Q384 -5 287 -5ZM399 230V250Q399 280 398 298T391 338T372 372T338 392T282 401Q241 401 212 380Q190 363 183 334T175 230Q175 202 175 189T177 153T183 118T195 91T215 68T245 56T287 50Q348 50 374 84Q388 101 393 132T399 230Z"></path></g><g data-mml-node="mi" transform="translate(1533,0)"><path data-c="1D425" d="M43 686L134 690Q225 694 226 694H232V62H301V0H292Q274 3 170 3Q67 3 49 0H40V62H109V332Q109 387 109 453T110 534Q110 593 108 605T94 620Q80 624 53 624H40V686H43Z"></path></g></g></g></g></svg></mjx-container></span></td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">LiCl</td> <td style="text-align: center; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">-834</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">NaCl</td> <td style="text-align: center; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">-788</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">KCl</td> <td style="text-align: center; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">-701</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">CsCl</td> <td style="text-align: center; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">-657</td> </tr> </tbody> </table> </div></div> <ul> <li>As can be seen, the lattice energy decreases as one moves down a group. This is due to the fact that ionic radius increases as one moves down a group, and as a result the distance between ions (bond length) increases.</li> <li>Also consider the lattice energy of the following two compounds:</li> </ul> <div class="table_tabular" style="text-align: center"> <div class="inline-tabular"><table class="tabular"> <tbody> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">Compound</td> <td style="text-align: center; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">Lattice Energy <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.566ex;" width="9.799ex" height="2.262ex" role="img" focusable="false" viewbox="0 -750 4331 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mo"><path data-c="28" d="M94 250Q94 319 104 381T127 488T164 576T202 643T244 695T277 729T302 750H315H319Q333 750 333 741Q333 738 316 720T275 667T226 581T184 443T167 250T184 58T225 -81T274 -167T316 -220T333 -241Q333 -250 318 -250H315H302L274 -226Q180 -141 137 -14T94 250Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(389,0)"><g data-mml-node="mi"><path data-c="1D424" d="M32 686L123 690Q214 694 215 694H221V255L377 382H346V444H355Q370 441 476 441Q544 441 556 444H562V382H476L347 277L515 62H587V0H579Q564 3 476 3Q370 3 352 0H343V62H358L373 63L260 206L237 189L216 172V62H285V0H277Q259 3 157 3Q46 3 37 0H29V62H98V332Q98 387 98 453T99 534Q99 593 97 605T83 620Q69 624 42 624H29V686H32Z"></path></g><g data-mml-node="mi" transform="translate(607,0)"><path data-c="1D409" d="M174 114Q174 96 169 82T159 63T144 47L155 45Q183 40 203 40Q271 40 290 104Q294 118 294 150T295 380V624H154V686H169Q196 683 365 683Q499 683 517 686H527V624H446V379Q446 183 446 153T441 108Q413 32 315 2Q266 -11 208 -11Q160 -11 118 -2T42 37T8 114V122Q8 150 30 174T91 198T152 174T174 122V114Z"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1590,0)"><g data-mml-node="mo"><path data-c="2F" d="M423 750Q432 750 438 744T444 730Q444 725 271 248T92 -240Q85 -250 75 -250Q68 -250 62 -245T56 -231Q56 -221 230 257T407 740Q411 750 423 750Z"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2090,0)"><g data-mml-node="mi"><path data-c="1D426" d="M40 442Q217 450 218 450H224V365Q226 367 235 378T254 397T278 416T314 435T362 448Q376 450 400 450H406Q503 450 534 393Q545 376 545 370Q545 368 555 379Q611 450 716 450Q774 450 809 434Q850 414 861 379T873 276V213V198V62H942V0H933Q915 3 809 3Q702 3 684 0H675V62H744V194V275Q744 348 735 373T690 399Q645 399 607 370T557 290Q555 281 554 171V62H623V0H614Q596 3 489 3Q374 3 365 0H356V62H425V194V275Q425 348 416 373T371 399Q326 399 288 370T238 290Q236 281 235 171V62H304V0H295Q277 3 171 3Q64 3 46 0H37V62H106V210V303Q106 353 104 363T91 376Q77 380 50 380H37V442H40Z"></path></g><g data-mml-node="mi" transform="translate(958,0)"><path data-c="1D428" d="M287 -5Q228 -5 182 10T109 48T63 102T39 161T32 219Q32 272 50 314T94 382T154 423T214 446T265 452H279Q319 452 326 451Q428 439 485 376T542 221Q542 156 514 108T442 33Q384 -5 287 -5ZM399 230V250Q399 280 398 298T391 338T372 372T338 392T282 401Q241 401 212 380Q190 363 183 334T175 230Q175 202 175 189T177 153T183 118T195 91T215 68T245 56T287 50Q348 50 374 84Q388 101 393 132T399 230Z"></path></g><g data-mml-node="mi" transform="translate(1533,0)"><path data-c="1D425" d="M43 686L134 690Q225 694 226 694H232V62H301V0H292Q274 3 170 3Q67 3 49 0H40V62H109V332Q109 387 109 453T110 534Q110 593 108 605T94 620Q80 624 53 624H40V686H43Z"></path></g></g><g data-mml-node="mo" transform="translate(3942,0)"><path data-c="29" d="M60 749L64 750Q69 750 74 750H86L114 726Q208 641 251 514T294 250Q294 182 284 119T261 12T224 -76T186 -143T145 -194T113 -227T90 -246Q87 -249 86 -250H74Q66 -250 63 -250T58 -247T55 -238Q56 -237 66 -225Q221 -64 221 250T66 725Q56 737 55 738Q55 746 60 749Z"></path></g></g></g></svg></mjx-container></span></td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">NaF</td> <td style="text-align: center; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">-910</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">CaO</td> <td style="text-align: center; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">-3414</td> </tr> </tbody> </table> </div></div> <div><figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-05.jpg?height=616&width=261&top_left_y=1342&top_left_x=1705" alt="" data-align="center" /></figure></div> <ul> <li>Note that the lattice energy of CaO is much greater than the lattice energy of NaF. Comparing the bond length of each ( 239 pm vs. 231 pm ), it is clear that the slightly longer bond length in CaO is not the cause of the large difference in their lattice energies.<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-05.jpg?height=227&width=238&top_left_y=2019&top_left_x=1486" alt="" data-align="center" /></figure><br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-05.jpg?height=222&width=242&top_left_y=2019&top_left_x=1772" alt="" data-align="center" /></figure></li> <li>The difference in the lattice energies between CaO and NaF can be attributed to the larger ion charges in <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.048ex;" width="4.997ex" height="2.09ex" role="img" focusable="false" viewbox="0 -903 2208.7 924"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msup"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="61" d="M137 305T115 305T78 320T63 359Q63 394 97 421T218 448Q291 448 336 416T396 340Q401 326 401 309T402 194V124Q402 76 407 58T428 40Q443 40 448 56T453 109V145H493V106Q492 66 490 59Q481 29 455 12T400 -6T353 12T329 54V58L327 55Q325 52 322 49T314 40T302 29T287 17T269 6T247 -2T221 -8T190 -11Q130 -11 82 20T34 107Q34 128 41 147T68 188T116 225T194 253T304 268H318V290Q318 324 312 340Q290 411 215 411Q197 411 181 410T156 406T148 403Q170 388 170 359Q170 334 154 320ZM126 106Q126 75 150 51T209 26Q247 26 276 49T315 109Q317 116 318 175Q318 233 317 233Q309 233 296 232T251 223T193 203T147 166T126 106Z" transform="translate(722,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1255,432.1) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g><g data-mml-node="mo" transform="translate(500,0)"><path data-c="2B" d="M56 237T56 250T70 270H369V420L370 570Q380 583 389 583Q402 583 409 568V270H707Q722 262 722 250T707 230H409V-68Q401 -82 391 -82H389H387Q375 -82 369 -68V230H70Q56 237 56 250Z"></path></g></g></g></g></g></svg></mjx-container></span> and <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.05ex;" width="3.992ex" height="1.937ex" role="img" focusable="false" viewbox="0 -833.9 1764.7 855.9"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msup"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(811,363) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g><g data-mml-node="mo" transform="translate(500,0)"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g></g></g></g></g></svg></mjx-container></span> compared to <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.025ex;" width="4.26ex" height="1.885ex" role="img" focusable="false" viewbox="0 -822.3 1883.1 833.3"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msup"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z"></path><path data-c="61" d="M137 305T115 305T78 320T63 359Q63 394 97 421T218 448Q291 448 336 416T396 340Q401 326 401 309T402 194V124Q402 76 407 58T428 40Q443 40 448 56T453 109V145H493V106Q492 66 490 59Q481 29 455 12T400 -6T353 12T329 54V58L327 55Q325 52 322 49T314 40T302 29T287 17T269 6T247 -2T221 -8T190 -11Q130 -11 82 20T34 107Q34 128 41 147T68 188T116 225T194 253T304 268H318V290Q318 324 312 340Q290 411 215 411Q197 411 181 410T156 406T148 403Q170 388 170 359Q170 334 154 320ZM126 106Q126 75 150 51T209 26Q247 26 276 49T315 109Q317 116 318 175Q318 233 317 233Q309 233 296 232T251 223T193 203T147 166T126 106Z" transform="translate(750,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1283,410.1) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mo"><path data-c="2B" d="M56 237T56 250T70 270H369V420L370 570Q380 583 389 583Q402 583 409 568V270H707Q722 262 722 250T707 230H409V-68Q401 -82 391 -82H389H387Q375 -82 369 -68V230H70Q56 237 56 250Z"></path></g></g></g></g></g></svg></mjx-container></span>and <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: 0;" width="2.91ex" height="1.754ex" role="img" focusable="false" viewbox="0 -775.2 1286.1 775.2"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msup"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="46" d="M128 619Q121 626 117 628T101 631T58 634H25V680H582V676Q584 670 596 560T610 444V440H570V444Q563 493 561 501Q555 538 543 563T516 601T477 622T431 631T374 633H334H286Q252 633 244 631T233 621Q232 619 232 490V363H284Q287 363 303 363T327 364T349 367T372 373T389 385Q407 403 410 459V480H450V200H410V221Q407 276 389 296Q381 303 371 307T348 313T327 316T303 317T284 317H232V189L233 61Q240 54 245 52T270 48T333 46H360V0H348Q324 3 182 3Q51 3 36 0H25V46H58Q100 47 109 49T128 61V619Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(686,363) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mo"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g></g></g></g></g></svg></mjx-container></span>.</li> </ul> <h2 type="section" data-unnumbered="true" id="lattice-energy-4" class="section-title"> LATTICE ENERGY</h2> <ul> <li>The trends in lattice energy can be summarized as follows:</li> <li>Lattice energies become less exothermic (less negative) with increasing ionic radius.</li> <li>Lattice energies become more exothermic (more negative) with increasing ionic charge.</li> </ul> <h2 type="section" data-unnumbered="true" id="examples%3A-2" class="section-title"> Examples:</h2> <ol> <li>Arrange the following ionic compounds in order of increasing magnitude of lattice energy: <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.439ex;" width="19.719ex" height="2.034ex" role="img" focusable="false" viewbox="0 -705 8716 899"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="61" d="M137 305T115 305T78 320T63 359Q63 394 97 421T218 448Q291 448 336 416T396 340Q401 326 401 309T402 194V124Q402 76 407 58T428 40Q443 40 448 56T453 109V145H493V106Q492 66 490 59Q481 29 455 12T400 -6T353 12T329 54V58L327 55Q325 52 322 49T314 40T302 29T287 17T269 6T247 -2T221 -8T190 -11Q130 -11 82 20T34 107Q34 128 41 147T68 188T116 225T194 253T304 268H318V290Q318 324 312 340Q290 411 215 411Q197 411 181 410T156 406T148 403Q170 388 170 359Q170 334 154 320ZM126 106Q126 75 150 51T209 26Q247 26 276 49T315 109Q317 116 318 175Q318 233 317 233Q309 233 296 232T251 223T193 203T147 166T126 106Z" transform="translate(722,0)"></path><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z" transform="translate(1222,0)"></path></g></g><g data-mml-node="mo" transform="translate(2000,0)"><path data-c="2C" d="M78 35T78 60T94 103T137 121Q165 121 187 96T210 8Q210 -27 201 -60T180 -117T154 -158T130 -185T117 -194Q113 -194 104 -185T95 -172Q95 -168 106 -156T131 -126T157 -76T173 -3V9L172 8Q170 7 167 6T161 3T152 1T140 0Q113 0 96 17Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2444.7,0)"><g data-mml-node="mi"><path data-c="4B" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H313Q235 637 233 620Q232 618 232 462L233 307L379 449Q425 494 479 546Q518 584 524 591T531 607V608Q531 630 503 636Q501 636 498 636T493 637H489V683H499Q517 680 630 680Q704 680 716 683H722V637H708Q633 633 589 597Q584 592 495 506T406 419T515 254T631 80Q644 60 662 54T715 46H736V0H728Q719 3 615 3Q493 3 472 0H461V46H469Q515 46 515 72Q515 78 512 84L336 351Q332 348 278 296L232 251V156Q232 62 235 58Q243 47 302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path><path data-c="42" d="M131 622Q124 629 120 631T104 634T61 637H28V683H229H267H346Q423 683 459 678T531 651Q574 627 599 590T624 512Q624 461 583 419T476 360L466 357Q539 348 595 302T651 187Q651 119 600 67T469 3Q456 1 242 0H28V46H61Q103 47 112 49T131 61V622ZM511 513Q511 560 485 594T416 636Q415 636 403 636T371 636T333 637Q266 637 251 636T232 628Q229 624 229 499V374H312L396 375L406 377Q410 378 417 380T442 393T474 417T499 456T511 513ZM537 188Q537 239 509 282T430 336L329 337H229V200V116Q229 57 234 52Q240 47 334 47H383Q425 47 443 53Q486 67 511 104T537 188Z" transform="translate(778,0)"></path><path data-c="72" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T98 122T98 161T98 203Q98 234 98 269T98 328L97 351Q94 370 83 376T38 385H20V408Q20 431 22 431L32 432Q42 433 60 434T96 436Q112 437 131 438T160 441T171 442H174V373Q213 441 271 441H277Q322 441 343 419T364 373Q364 352 351 337T313 322Q288 322 276 338T263 372Q263 381 265 388T270 400T273 405Q271 407 250 401Q234 393 226 386Q179 341 179 207V154Q179 141 179 127T179 101T180 81T180 66V61Q181 59 183 57T188 54T193 51T200 49T207 48T216 47T225 47T235 46T245 46H276V0H267Q249 3 140 3Q37 3 28 0H20V46H36Z" transform="translate(1486,0)"></path></g></g><g data-mml-node="mo" transform="translate(4322.7,0)"><path data-c="2C" d="M78 35T78 60T94 103T137 121Q165 121 187 96T210 8Q210 -27 201 -60T180 -117T154 -158T130 -185T117 -194Q113 -194 104 -185T95 -172Q95 -168 106 -156T131 -126T157 -76T173 -3V9L172 8Q170 7 167 6T161 3T152 1T140 0Q113 0 96 17Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(4767.3,0)"><g data-mml-node="mi"><path data-c="4B" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H313Q235 637 233 620Q232 618 232 462L233 307L379 449Q425 494 479 546Q518 584 524 591T531 607V608Q531 630 503 636Q501 636 498 636T493 637H489V683H499Q517 680 630 680Q704 680 716 683H722V637H708Q633 633 589 597Q584 592 495 506T406 419T515 254T631 80Q644 60 662 54T715 46H736V0H728Q719 3 615 3Q493 3 472 0H461V46H469Q515 46 515 72Q515 78 512 84L336 351Q332 348 278 296L232 251V156Q232 62 235 58Q243 47 302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z" transform="translate(778,0)"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(1500,0)"></path></g></g><g data-mml-node="mo" transform="translate(6545.3,0)"><path data-c="2C" d="M78 35T78 60T94 103T137 121Q165 121 187 96T210 8Q210 -27 201 -60T180 -117T154 -158T130 -185T117 -194Q113 -194 104 -185T95 -172Q95 -168 106 -156T131 -126T157 -76T173 -3V9L172 8Q170 7 167 6T161 3T152 1T140 0Q113 0 96 17Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(6990,0)"><g data-mml-node="mi"><path data-c="53" d="M55 507Q55 590 112 647T243 704H257Q342 704 405 641L426 672Q431 679 436 687T446 700L449 704Q450 704 453 704T459 705H463Q466 705 472 699V462L466 456H448Q437 456 435 459T430 479Q413 605 329 646Q292 662 254 662Q201 662 168 626T135 542Q135 508 152 480T200 435Q210 431 286 412T370 389Q427 367 463 314T500 191Q500 110 448 45T301 -21Q245 -21 201 -4T140 27L122 41Q118 36 107 21T87 -7T78 -21Q76 -22 68 -22H64Q61 -22 55 -16V101Q55 220 56 222Q58 227 76 227H89Q95 221 95 214Q95 182 105 151T139 90T205 42T305 24Q352 24 386 62T420 155Q420 198 398 233T340 281Q284 295 266 300Q261 301 239 306T206 314T174 325T141 343T112 367T85 402Q55 451 55 507Z"></path><path data-c="72" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T98 122T98 161T98 203Q98 234 98 269T98 328L97 351Q94 370 83 376T38 385H20V408Q20 431 22 431L32 432Q42 433 60 434T96 436Q112 437 131 438T160 441T171 442H174V373Q213 441 271 441H277Q322 441 343 419T364 373Q364 352 351 337T313 322Q288 322 276 338T263 372Q263 381 265 388T270 400T273 405Q271 407 250 401Q234 393 226 386Q179 341 179 207V154Q179 141 179 127T179 101T180 81T180 66V61Q181 59 183 57T188 54T193 51T200 49T207 48T216 47T225 47T235 46T245 46H276V0H267Q249 3 140 3Q37 3 28 0H20V46H36Z" transform="translate(556,0)"></path><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z" transform="translate(948,0)"></path></g></g></g></g></svg></mjx-container></span></li> <li>Arrange the following in order of increasing magnitude of lattice energy: <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.439ex;" width="13.646ex" height="2.034ex" role="img" focusable="false" viewbox="0 -705 6031.3 899"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4C" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q48 680 182 680Q324 680 348 683H360V637H333Q273 637 258 635T233 622L232 342V129Q232 57 237 52Q243 47 313 47Q384 47 410 53Q470 70 498 110T536 221Q536 226 537 238T540 261T542 272T562 273H582V268Q580 265 568 137T554 5V0H25V46H58Q100 47 109 49T128 61V622Z"></path><path data-c="69" d="M69 609Q69 637 87 653T131 669Q154 667 171 652T188 609Q188 579 171 564T129 549Q104 549 87 564T69 609ZM247 0Q232 3 143 3Q132 3 106 3T56 1L34 0H26V46H42Q70 46 91 49Q100 53 102 60T104 102V205V293Q104 345 102 359T88 378Q74 385 41 385H30V408Q30 431 32 431L42 432Q52 433 70 434T106 436Q123 437 142 438T171 441T182 442H185V62Q190 52 197 50T232 46H255V0H247Z" transform="translate(625,0)"></path><path data-c="42" d="M131 622Q124 629 120 631T104 634T61 637H28V683H229H267H346Q423 683 459 678T531 651Q574 627 599 590T624 512Q624 461 583 419T476 360L466 357Q539 348 595 302T651 187Q651 119 600 67T469 3Q456 1 242 0H28V46H61Q103 47 112 49T131 61V622ZM511 513Q511 560 485 594T416 636Q415 636 403 636T371 636T333 637Q266 637 251 636T232 628Q229 624 229 499V374H312L396 375L406 377Q410 378 417 380T442 393T474 417T499 456T511 513ZM537 188Q537 239 509 282T430 336L329 337H229V200V116Q229 57 234 52Q240 47 334 47H383Q425 47 443 53Q486 67 511 104T537 188Z" transform="translate(903,0)"></path><path data-c="72" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T98 122T98 161T98 203Q98 234 98 269T98 328L97 351Q94 370 83 376T38 385H20V408Q20 431 22 431L32 432Q42 433 60 434T96 436Q112 437 131 438T160 441T171 442H174V373Q213 441 271 441H277Q322 441 343 419T364 373Q364 352 351 337T313 322Q288 322 276 338T263 372Q263 381 265 388T270 400T273 405Q271 407 250 401Q234 393 226 386Q179 341 179 207V154Q179 141 179 127T179 101T180 81T180 66V61Q181 59 183 57T188 54T193 51T200 49T207 48T216 47T225 47T235 46T245 46H276V0H267Q249 3 140 3Q37 3 28 0H20V46H36Z" transform="translate(1611,0)"></path></g></g><g data-mml-node="mo" transform="translate(2003,0)"><path data-c="2C" d="M78 35T78 60T94 103T137 121Q165 121 187 96T210 8Q210 -27 201 -60T180 -117T154 -158T130 -185T117 -194Q113 -194 104 -185T95 -172Q95 -168 106 -156T131 -126T157 -76T173 -3V9L172 8Q170 7 167 6T161 3T152 1T140 0Q113 0 96 17Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2447.7,0)"><g data-mml-node="mi"><path data-c="4B" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H313Q235 637 233 620Q232 618 232 462L233 307L379 449Q425 494 479 546Q518 584 524 591T531 607V608Q531 630 503 636Q501 636 498 636T493 637H489V683H499Q517 680 630 680Q704 680 716 683H722V637H708Q633 633 589 597Q584 592 495 506T406 419T515 254T631 80Q644 60 662 54T715 46H736V0H728Q719 3 615 3Q493 3 472 0H461V46H469Q515 46 515 72Q515 78 512 84L336 351Q332 348 278 296L232 251V156Q232 62 235 58Q243 47 302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path><path data-c="49" d="M328 0Q307 3 180 3T32 0H21V46H43Q92 46 106 49T126 60Q128 63 128 342Q128 620 126 623Q122 628 118 630T96 635T43 637H21V683H32Q53 680 180 680T328 683H339V637H317Q268 637 254 634T234 623Q232 620 232 342Q232 63 234 60Q238 55 242 53T264 48T317 46H339V0H328Z" transform="translate(778,0)"></path></g></g><g data-mml-node="mo" transform="translate(3586.7,0)"><path data-c="2C" d="M78 35T78 60T94 103T137 121Q165 121 187 96T210 8Q210 -27 201 -60T180 -117T154 -158T130 -185T117 -194Q113 -194 104 -185T95 -172Q95 -168 106 -156T131 -126T157 -76T173 -3V9L172 8Q170 7 167 6T161 3T152 1T140 0Q113 0 96 17Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(4031.3,0)"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="61" d="M137 305T115 305T78 320T63 359Q63 394 97 421T218 448Q291 448 336 416T396 340Q401 326 401 309T402 194V124Q402 76 407 58T428 40Q443 40 448 56T453 109V145H493V106Q492 66 490 59Q481 29 455 12T400 -6T353 12T329 54V58L327 55Q325 52 322 49T314 40T302 29T287 17T269 6T247 -2T221 -8T190 -11Q130 -11 82 20T34 107Q34 128 41 147T68 188T116 225T194 253T304 268H318V290Q318 324 312 340Q290 411 215 411Q197 411 181 410T156 406T148 403Q170 388 170 359Q170 334 154 320ZM126 106Q126 75 150 51T209 26Q247 26 276 49T315 109Q317 116 318 175Q318 233 317 233Q309 233 296 232T251 223T193 203T147 166T126 106Z" transform="translate(722,0)"></path><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z" transform="translate(1222,0)"></path></g></g></g></g></svg></mjx-container></span></li> <li>Lattice energy of CsF is <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.566ex;" width="12.853ex" height="2.262ex" role="img" focusable="false" viewbox="0 -750 5681 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mo"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="mn" transform="translate(778,0)"><path data-c="37" d="M55 458Q56 460 72 567L88 674Q88 676 108 676H128V672Q128 662 143 655T195 646T364 644H485V605L417 512Q408 500 387 472T360 435T339 403T319 367T305 330T292 284T284 230T278 162T275 80Q275 66 275 52T274 28V19Q270 2 255 -10T221 -22Q210 -22 200 -19T179 0T168 40Q168 198 265 368Q285 400 349 489L395 552H302Q128 552 119 546Q113 543 108 522T98 479L95 458V455H55V458Z"></path><path data-c="34" d="M462 0Q444 3 333 3Q217 3 199 0H190V46H221Q241 46 248 46T265 48T279 53T286 61Q287 63 287 115V165H28V211L179 442Q332 674 334 675Q336 677 355 677H373L379 671V211H471V165H379V114Q379 73 379 66T385 54Q393 47 442 46H471V0H462ZM293 211V545L74 212L183 211H293Z" transform="translate(500,0)"></path><path data-c="34" d="M462 0Q444 3 333 3Q217 3 199 0H190V46H221Q241 46 248 46T265 48T279 53T286 61Q287 63 287 115V165H28V211L179 442Q332 674 334 675Q336 677 355 677H373L379 671V211H471V165H379V114Q379 73 379 66T385 54Q393 47 442 46H471V0H462ZM293 211V545L74 212L183 211H293Z" transform="translate(1000,0)"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2278,0)"><g data-mml-node="mtext"><path data-c="A0" d=""></path></g><g data-mml-node="mi" transform="translate(250,0)"><path data-c="6B" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T97 124T98 167T98 217T98 272T98 329Q98 366 98 407T98 482T98 542T97 586T97 603Q94 622 83 628T38 637H20V660Q20 683 22 683L32 684Q42 685 61 686T98 688Q115 689 135 690T165 693T176 694H179V463L180 233L240 287Q300 341 304 347Q310 356 310 364Q310 383 289 385H284V431H293Q308 428 412 428Q475 428 484 431H489V385H476Q407 380 360 341Q286 278 286 274Q286 273 349 181T420 79Q434 60 451 53T500 46H511V0H505Q496 3 418 3Q322 3 307 0H299V46H306Q330 48 330 65Q330 72 326 79Q323 84 276 153T228 222L176 176V120V84Q176 65 178 59T189 49Q210 46 238 46H254V0H246Q231 3 137 3T28 0H20V46H36Z"></path><path data-c="4A" d="M89 177Q115 177 133 160T152 112Q152 88 137 72T102 52Q99 51 101 49Q106 43 129 29Q159 15 190 15Q232 15 256 48T286 126Q286 127 286 142T286 183T286 238T287 306T287 378Q287 403 287 429T287 479T287 524T286 563T286 593T286 614V621Q281 630 263 633T182 637H154V683H166Q187 680 332 680Q439 680 457 683H465V637H449Q422 637 401 634Q393 631 389 623Q388 621 388 376T387 123Q377 61 322 20T194 -22Q188 -22 177 -21T160 -20Q96 -9 61 29T25 110Q25 144 44 160T89 177Z" transform="translate(528,0)"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(3570,0)"><g data-mml-node="mo"><path data-c="2F" d="M423 750Q432 750 438 744T444 730Q444 725 271 248T92 -240Q85 -250 75 -250Q68 -250 62 -245T56 -231Q56 -221 230 257T407 740Q411 750 423 750Z"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(4070,0)"><g data-mml-node="mi"><path data-c="6D" d="M41 46H55Q94 46 102 60V68Q102 77 102 91T102 122T103 161T103 203Q103 234 103 269T102 328V351Q99 370 88 376T43 385H25V408Q25 431 27 431L37 432Q47 433 65 434T102 436Q119 437 138 438T167 441T178 442H181V402Q181 364 182 364T187 369T199 384T218 402T247 421T285 437Q305 442 336 442Q351 442 364 440T387 434T406 426T421 417T432 406T441 395T448 384T452 374T455 366L457 361L460 365Q463 369 466 373T475 384T488 397T503 410T523 422T546 432T572 439T603 442Q729 442 740 329Q741 322 741 190V104Q741 66 743 59T754 49Q775 46 803 46H819V0H811L788 1Q764 2 737 2T699 3Q596 3 587 0H579V46H595Q656 46 656 62Q657 64 657 200Q656 335 655 343Q649 371 635 385T611 402T585 404Q540 404 506 370Q479 343 472 315T464 232V168V108Q464 78 465 68T468 55T477 49Q498 46 526 46H542V0H534L510 1Q487 2 460 2T422 3Q319 3 310 0H302V46H318Q379 46 379 62Q380 64 380 200Q379 335 378 343Q372 371 358 385T334 402T308 404Q263 404 229 370Q202 343 195 315T187 232V168V108Q187 78 188 68T191 55T200 49Q221 46 249 46H265V0H257L234 1Q210 2 183 2T145 3Q42 3 33 0H25V46H41Z"></path><path data-c="6F" d="M28 214Q28 309 93 378T250 448Q340 448 405 380T471 215Q471 120 407 55T250 -10Q153 -10 91 57T28 214ZM250 30Q372 30 372 193V225V250Q372 272 371 288T364 326T348 362T317 390T268 410Q263 411 252 411Q222 411 195 399Q152 377 139 338T126 246V226Q126 130 145 91Q177 30 250 30Z" transform="translate(833,0)"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(1333,0)"></path></g></g></g></g></svg></mjx-container></span>, whereas that of BaO is <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.566ex;" width="13.984ex" height="2.262ex" role="img" focusable="false" viewbox="0 -750 6181 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mo"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="mn" transform="translate(778,0)"><path data-c="33" d="M127 463Q100 463 85 480T69 524Q69 579 117 622T233 665Q268 665 277 664Q351 652 390 611T430 522Q430 470 396 421T302 350L299 348Q299 347 308 345T337 336T375 315Q457 262 457 175Q457 96 395 37T238 -22Q158 -22 100 21T42 130Q42 158 60 175T105 193Q133 193 151 175T169 130Q169 119 166 110T159 94T148 82T136 74T126 70T118 67L114 66Q165 21 238 21Q293 21 321 74Q338 107 338 175V195Q338 290 274 322Q259 328 213 329L171 330L168 332Q166 335 166 348Q166 366 174 366Q202 366 232 371Q266 376 294 413T322 525V533Q322 590 287 612Q265 626 240 626Q208 626 181 615T143 592T132 580H135Q138 579 143 578T153 573T165 566T175 555T183 540T186 520Q186 498 172 481T127 463Z"></path><path data-c="30" d="M96 585Q152 666 249 666Q297 666 345 640T423 548Q460 465 460 320Q460 165 417 83Q397 41 362 16T301 -15T250 -22Q224 -22 198 -16T137 16T82 83Q39 165 39 320Q39 494 96 585ZM321 597Q291 629 250 629Q208 629 178 597Q153 571 145 525T137 333Q137 175 145 125T181 46Q209 16 250 16Q290 16 318 46Q347 76 354 130T362 333Q362 478 354 524T321 597Z" transform="translate(500,0)"></path><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z" transform="translate(1000,0)"></path><path data-c="39" d="M352 287Q304 211 232 211Q154 211 104 270T44 396Q42 412 42 436V444Q42 537 111 606Q171 666 243 666Q245 666 249 666T257 665H261Q273 665 286 663T323 651T370 619T413 560Q456 472 456 334Q456 194 396 97Q361 41 312 10T208 -22Q147 -22 108 7T68 93T121 149Q143 149 158 135T173 96Q173 78 164 65T148 49T135 44L131 43Q131 41 138 37T164 27T206 22H212Q272 22 313 86Q352 142 352 280V287ZM244 248Q292 248 321 297T351 430Q351 508 343 542Q341 552 337 562T323 588T293 615T246 625Q208 625 181 598Q160 576 154 546T147 441Q147 358 152 329T172 282Q197 248 244 248Z" transform="translate(1500,0)"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2778,0)"><g data-mml-node="mtext"><path data-c="A0" d=""></path></g><g data-mml-node="mi" transform="translate(250,0)"><path data-c="6B" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T97 124T98 167T98 217T98 272T98 329Q98 366 98 407T98 482T98 542T97 586T97 603Q94 622 83 628T38 637H20V660Q20 683 22 683L32 684Q42 685 61 686T98 688Q115 689 135 690T165 693T176 694H179V463L180 233L240 287Q300 341 304 347Q310 356 310 364Q310 383 289 385H284V431H293Q308 428 412 428Q475 428 484 431H489V385H476Q407 380 360 341Q286 278 286 274Q286 273 349 181T420 79Q434 60 451 53T500 46H511V0H505Q496 3 418 3Q322 3 307 0H299V46H306Q330 48 330 65Q330 72 326 79Q323 84 276 153T228 222L176 176V120V84Q176 65 178 59T189 49Q210 46 238 46H254V0H246Q231 3 137 3T28 0H20V46H36Z"></path><path data-c="4A" d="M89 177Q115 177 133 160T152 112Q152 88 137 72T102 52Q99 51 101 49Q106 43 129 29Q159 15 190 15Q232 15 256 48T286 126Q286 127 286 142T286 183T286 238T287 306T287 378Q287 403 287 429T287 479T287 524T286 563T286 593T286 614V621Q281 630 263 633T182 637H154V683H166Q187 680 332 680Q439 680 457 683H465V637H449Q422 637 401 634Q393 631 389 623Q388 621 388 376T387 123Q377 61 322 20T194 -22Q188 -22 177 -21T160 -20Q96 -9 61 29T25 110Q25 144 44 160T89 177Z" transform="translate(528,0)"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(4070,0)"><g data-mml-node="mo"><path data-c="2F" d="M423 750Q432 750 438 744T444 730Q444 725 271 248T92 -240Q85 -250 75 -250Q68 -250 62 -245T56 -231Q56 -221 230 257T407 740Q411 750 423 750Z"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(4570,0)"><g data-mml-node="mi"><path data-c="6D" d="M41 46H55Q94 46 102 60V68Q102 77 102 91T102 122T103 161T103 203Q103 234 103 269T102 328V351Q99 370 88 376T43 385H25V408Q25 431 27 431L37 432Q47 433 65 434T102 436Q119 437 138 438T167 441T178 442H181V402Q181 364 182 364T187 369T199 384T218 402T247 421T285 437Q305 442 336 442Q351 442 364 440T387 434T406 426T421 417T432 406T441 395T448 384T452 374T455 366L457 361L460 365Q463 369 466 373T475 384T488 397T503 410T523 422T546 432T572 439T603 442Q729 442 740 329Q741 322 741 190V104Q741 66 743 59T754 49Q775 46 803 46H819V0H811L788 1Q764 2 737 2T699 3Q596 3 587 0H579V46H595Q656 46 656 62Q657 64 657 200Q656 335 655 343Q649 371 635 385T611 402T585 404Q540 404 506 370Q479 343 472 315T464 232V168V108Q464 78 465 68T468 55T477 49Q498 46 526 46H542V0H534L510 1Q487 2 460 2T422 3Q319 3 310 0H302V46H318Q379 46 379 62Q380 64 380 200Q379 335 378 343Q372 371 358 385T334 402T308 404Q263 404 229 370Q202 343 195 315T187 232V168V108Q187 78 188 68T191 55T200 49Q221 46 249 46H265V0H257L234 1Q210 2 183 2T145 3Q42 3 33 0H25V46H41Z"></path><path data-c="6F" d="M28 214Q28 309 93 378T250 448Q340 448 405 380T471 215Q471 120 407 55T250 -10Q153 -10 91 57T28 214ZM250 30Q372 30 372 193V225V250Q372 272 371 288T364 326T348 362T317 390T268 410Q263 411 252 411Q222 411 195 399Q152 377 139 338T126 246V226Q126 130 145 91Q177 30 250 30Z" transform="translate(833,0)"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(1333,0)"></path></g></g></g></g></svg></mjx-container></span>. Explain this large difference.</li> </ol> <h2 type="section" data-unnumbered="true" id="lewis-structures-for-covalent-compounds" class="section-title"> LEWIS STRUCTURES FOR COVALENT COMPOUNDS</h2> <ul> <li>Lewis model provides a simple and useful model for covalent bonding. Molecular compounds are represented with Lewis structures, where neighboring atoms share some (or all) of their valence electrons to attain the octets (or duets for H ).</li> <li>For example, the Lewis structure for water <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.566ex;" width="6.205ex" height="2.262ex" role="img" focusable="false" viewbox="0 -750 2742.6 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mrow"><g data-mml-node="mo"><path data-c="28" d="M94 250Q94 319 104 381T127 488T164 576T202 643T244 695T277 729T302 750H315H319Q333 750 333 741Q333 738 316 720T275 667T226 581T184 443T167 250T184 58T225 -81T274 -167T316 -220T333 -241Q333 -250 318 -250H315H302L274 -226Q180 -141 137 -14T94 250Z"></path></g><g data-mml-node="msub" transform="translate(389,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1575.6,0)"><g data-mml-node="mi"><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z"></path></g></g><g data-mml-node="mo" transform="translate(2353.6,0)"><path data-c="29" d="M60 749L64 750Q69 750 74 750H86L114 726Q208 641 251 514T294 250Q294 182 284 119T261 12T224 -76T186 -143T145 -194T113 -227T90 -246Q87 -249 86 -250H74Q66 -250 63 -250T58 -247T55 -238Q56 -237 66 -225Q221 -64 221 250T66 725Q56 737 55 738Q55 746 60 749Z"></path></g></g></g></g></svg></mjx-container></span> is shown below:<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-07.jpg?height=240&width=480&top_left_y=678&top_left_x=923" alt="" data-align="center" /></figure></li> <li>The electrons that are shared between the atoms are called bonding pair electrons, while those that are only on one atom are called lone pair electrons.<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-07.jpg?height=283&width=474&top_left_y=1082&top_left_x=908" alt="" data-align="center" /></figure></li> <li>The bonding pair electrons can often represented as dash lines, to emphasize that they are chemical bonds, but the lone pair electrons are always displayed as dots. For example, the Lewis structure of water can also be represented as shown below:<br /> <div class="smiles-inline" style="display: inline-block;"><svg id="smiles-mjrskucey6u134fywz" viewbox="0 0 112 56.099999999999994" style="width: 112.19999999999999px; height: 56.099999999999994px; overflow: visible;"><defs></defs><mask id="text-mask-mjrskucey6u134fywz"><rect x="0" y="0" width="100%" height="100%" fill="white"></rect><circle cx="56.099999999999994" cy="28.049999999999997" r="10.518749999999999" fill="black"></circle></mask><style>/*<![CDATA[*/ .element-mjrskucey6u134fywz { font: 18.7px Helvetica, Arial, sans-serif; alignment-baseline: 'middle'; } .sub-mjrskucey6u134fywz { font: 11.219999999999999px Helvetica, Arial, sans-serif; } /*]]>*/</style><g mask="url(#text-mask-mjrskucey6u134fywz)"></g><g><text x="49.08749999999999" y="35.0625" class="element-mjrskucey6u134fywz" fill="currentColor" style="text-anchor: start; writing-mode: horizontal-tb; text-orientation: mixed; letter-spacing: normal; direction: ltr;"><tspan>O</tspan><tspan style="unicode-bidi: plaintext;">H<tspan baseline-shift="sub" class="sub-mjrskucey6u134fywz">2</tspan></tspan></text><text x="56.099999999999994" y="28.049999999999997" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text></g></svg></div></li> <li>The Lewis model also explains why halogens are diatomic. Since each Cl atom has only one unpaired electron, 2 chlorine atoms can share the unpaired electron to complete their octet, as shown below:<br /> <div class="smiles-inline" style="display: inline-block;"><svg id="smiles-mjrskucqlrazvvrba4h" viewbox="0 0 222 77.13757359077603" style="width: 221.51404243011365px; height: 77.13757359077603px; overflow: visible;"><defs><lineargradient id="line-mjrskucqlrazvvrba4h-1" gradientunits="userSpaceOnUse" x1="128.976037728444" y1="28.05004906052055" x2="165.41404243011365" y2="49.087573590776046"><stop stop-color="currentColor" offset="20%"></stop><stop stop-color="currentColor" offset="100%"></stop></lineargradient><lineargradient id="line-mjrskucqlrazvvrba4h-3" gradientunits="userSpaceOnUse" x1="92.53800470166962" y1="49.08752453025549" x2="128.976037728444" y2="28.05004906052055"><stop stop-color="currentColor" offset="20%"></stop><stop stop-color="currentColor" offset="100%"></stop></lineargradient><lineargradient id="line-mjrskucqlrazvvrba4h-5" gradientunits="userSpaceOnUse" x1="56.099999999999994" y1="28.049999999999997" x2="92.53800470166962" y2="49.08752453025549"><stop stop-color="currentColor" offset="20%"></stop><stop stop-color="currentColor" offset="100%"></stop></lineargradient></defs><mask id="text-mask-mjrskucqlrazvvrba4h"><rect x="0" y="0" width="100%" height="100%" fill="white"></rect><circle cx="165.41404243011365" cy="49.087573590776046" r="10.518749999999999" fill="black"></circle><circle cx="128.976037728444" cy="28.05004906052055" r="17.53125" fill="black"></circle><circle cx="92.53800470166962" cy="49.08752453025549" r="14.024999999999999" fill="black"></circle><circle cx="56.099999999999994" cy="28.049999999999997" r="10.518749999999999" fill="black"></circle></mask><style>/*<![CDATA[*/ .element-mjrskucqlrazvvrba4h { font: 18.7px Helvetica, Arial, sans-serif; alignment-baseline: 'middle'; } .sub-mjrskucqlrazvvrba4h { font: 11.219999999999999px Helvetica, Arial, sans-serif; } /*]]>*/</style><g mask="url(#text-mask-mjrskucqlrazvvrba4h)"><line x1="128.976037728444" y1="28.05004906052055" x2="165.41404243011365" y2="49.087573590776046" style="stroke-linecap:round;stroke-dasharray:none;stroke-width:1.6829999999999998" stroke="url('#line-mjrskucqlrazvvrba4h-1')"></line><line x1="92.53800470166962" y1="49.08752453025549" x2="128.976037728444" y2="28.05004906052055" style="stroke-linecap:round;stroke-dasharray:none;stroke-width:1.6829999999999998" stroke="url('#line-mjrskucqlrazvvrba4h-3')"></line><line x1="56.099999999999994" y1="28.049999999999997" x2="92.53800470166962" y2="49.08752453025549" style="stroke-linecap:round;stroke-dasharray:none;stroke-width:1.6829999999999998" stroke="url('#line-mjrskucqlrazvvrba4h-5')"></line></g><g><text x="160.15466743011365" y="56.10007359077605" class="element-mjrskucqlrazvvrba4h" fill="currentColor" style="text-anchor: start; writing-mode: horizontal-tb; text-orientation: mixed; letter-spacing: normal; direction: ltr;"><tspan style=" unicode-bidi: plaintext; writing-mode: lr-tb; letter-spacing: normal; text-anchor: start; ">Cl</tspan></text><text x="165.41404243011365" y="49.087573590776046" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text><text x="128.976037728444" y="35.06254906052055" class="element-mjrskucqlrazvvrba4h" fill="currentColor" style="text-anchor: start; glyph-orientation-vertical: 0; writing-mode: vertical-rl; text-orientation: upright; letter-spacing: -1px; direction: rtl; unicode-bidi: bidi-override;"><tspan style=" unicode-bidi: plaintext; writing-mode: lr-tb; letter-spacing: normal; text-anchor: middle; ">Ge</tspan></text><text x="128.976037728444" y="28.05004906052055" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text><text x="92.53800470166962" y="56.100024530255496" class="element-mjrskucqlrazvvrba4h" fill="currentColor" style="text-anchor: start; glyph-orientation-vertical: 0; writing-mode: vertical-rl; text-orientation: upright; letter-spacing: -1px; direction: ltr;"><tspan style=" unicode-bidi: plaintext; writing-mode: lr-tb; letter-spacing: normal; text-anchor: middle; ">Ge</tspan></text><text x="92.53800470166962" y="49.08752453025549" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text><text x="63.1125" y="35.0625" class="element-mjrskucqlrazvvrba4h" fill="currentColor" style="text-anchor: start; writing-mode: horizontal-tb; text-orientation: mixed; letter-spacing: normal; direction: rtl; unicode-bidi: bidi-override;"><tspan style=" unicode-bidi: plaintext; writing-mode: lr-tb; letter-spacing: normal; text-anchor: start; ">Cl</tspan></text><text x="56.099999999999994" y="28.049999999999997" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text></g></svg></div></li> <li>The Lewis model also allows atoms to share more than one pair of electrons to achieve octet. For example, when 2 oxygen atoms share only one pair of electrons, they do not achieve octet (diagram on left). However, sharing of 2 pair of electrons (one lone pair and one bonding pair) does achieve octet (diagams on right).</li> </ul> <div><span class="math-block "> <mjx-container class="MathJax" jax="SVG" display="true"><svg style="vertical-align: -0.186ex;" width="33.635ex" height="2.505ex" role="img" focusable="false" viewbox="0 -1025 14866.9 1107"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mo"><path data-c="3A" d="M78 370Q78 394 95 412T138 430Q162 430 180 414T199 371Q199 346 182 328T139 310T96 327T78 370ZM78 60Q78 84 95 102T138 120Q162 120 180 104T199 61Q199 36 182 18T139 0T96 17T78 60Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(555.8,0)"><g data-mml-node="mover"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z"></path></g></g><g data-mml-node="mo" transform="translate(389,256) translate(-250 0)"><path data-c="A8" d="M95 612Q95 633 112 651T153 669T193 652T210 612Q210 588 194 571T152 554L127 560Q95 577 95 612ZM289 611Q289 634 304 649T335 668Q336 668 340 668T346 669Q369 669 386 652T404 612T387 572T346 554Q323 554 306 570T289 611Z"></path></g></g></g><g data-mml-node="mo" transform="translate(1611.6,0)"><path data-c="3A" d="M78 370Q78 394 95 412T138 430Q162 430 180 414T199 371Q199 346 182 328T139 310T96 327T78 370ZM78 60Q78 84 95 102T138 120Q162 120 180 104T199 61Q199 36 182 18T139 0T96 17T78 60Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2167.3,0)"><g data-mml-node="mover"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path 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transform="translate(8640.2,0)"><path data-c="3A" d="M78 370Q78 394 95 412T138 430Q162 430 180 414T199 371Q199 346 182 328T139 310T96 327T78 370ZM78 60Q78 84 95 102T138 120Q162 120 180 104T199 61Q199 36 182 18T139 0T96 17T78 60Z"></path></g><g data-mml-node="mtext" transform="translate(9196,0)"><path data-c="A0" d=""></path><path data-c="6F" d="M28 214Q28 309 93 378T250 448Q340 448 405 380T471 215Q471 120 407 55T250 -10Q153 -10 91 57T28 214ZM250 30Q372 30 372 193V225V250Q372 272 371 288T364 326T348 362T317 390T268 410Q263 411 252 411Q222 411 195 399Q152 377 139 338T126 246V226Q126 130 145 91Q177 30 250 30Z" transform="translate(250,0)"></path><path data-c="72" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T98 122T98 161T98 203Q98 234 98 269T98 328L97 351Q94 370 83 376T38 385H20V408Q20 431 22 431L32 432Q42 433 60 434T96 436Q112 437 131 438T160 441T171 442H174V373Q213 441 271 441H277Q322 441 343 419T364 373Q364 352 351 337T313 322Q288 322 276 338T263 372Q263 381 265 388T270 400T273 405Q271 407 250 401Q234 393 226 386Q179 341 179 207V154Q179 141 179 127T179 101T180 81T180 66V61Q181 59 183 57T188 54T193 51T200 49T207 48T216 47T225 47T235 46T245 46H276V0H267Q249 3 140 3Q37 3 28 0H20V46H36Z" transform="translate(750,0)"></path><path data-c="A0" d="" transform="translate(1142,0)"></path></g><g data-mml-node="mo" transform="translate(10865.8,0)"><path data-c="3A" d="M78 370Q78 394 95 412T138 430Q162 430 180 414T199 371Q199 346 182 328T139 310T96 327T78 370ZM78 60Q78 84 95 102T138 120Q162 120 180 104T199 61Q199 36 182 18T139 0T96 17T78 60Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(11421.6,0)"><g data-mml-node="mi"><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z"></path></g></g><g data-mml-node="mo" transform="translate(12477.3,0)"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347Q722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153Q722 140 707 133H70Q56 140 56 153Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(13533.1,0)"><g data-mml-node="mover"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z"></path></g></g><g data-mml-node="mo" transform="translate(389,256) translate(-250 0)"><path data-c="A8" d="M95 612Q95 633 112 651T153 669T193 652T210 612Q210 588 194 571T152 554L127 560Q95 577 95 612ZM289 611Q289 634 304 649T335 668Q336 668 340 668T346 669Q369 669 386 652T404 612T387 572T346 554Q323 554 306 570T289 611Z"></path></g></g></g><g data-mml-node="mo" transform="translate(14588.9,0)"><path data-c="3A" d="M78 370Q78 394 95 412T138 430Q162 430 180 414T199 371Q199 346 182 328T139 310T96 327T78 370ZM78 60Q78 84 95 102T138 120Q162 120 180 104T199 61Q199 36 182 18T139 0T96 17T78 60Z"></path></g></g></g></svg></mjx-container></span></div> <h2 type="section" data-unnumbered="true" id="electronegativity-%5C%26-bond-polarity" class="section-title"> ELECTRONEGATIVITY & BOND POLARITY</h2> <ul> <li>Lewis structures, although useful, have limitations in representing bonding in covalent molecules. One limitation is that representing electrons as dots and bonds as two dots shared between atoms, make them appear as being shared equally.</li> <li>For example, the two shared electrons in HF molecule are not shared equally and laboratory observations have shown that the H side of molecule possesses a slightly positive charge while the F side of the molecule possesses a slightly negative charge. This partial separation of the charges in <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="5.94ex" height="1.731ex" role="img" focusable="false" viewbox="0 -683 2625.4 765"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="mo" transform="translate(972.2,0)"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1972.4,0)"><g data-mml-node="mi"><path data-c="46" d="M128 619Q121 626 117 628T101 631T58 634H25V680H582V676Q584 670 596 560T610 444V440H570V444Q563 493 561 501Q555 538 543 563T516 601T477 622T431 631T374 633H334H286Q252 633 244 631T233 621Q232 619 232 490V363H284Q287 363 303 363T327 364T349 367T372 373T389 385Q407 403 410 459V480H450V200H410V221Q407 276 389 296Q381 303 371 307T348 313T327 316T303 317T284 317H232V189L233 61Q240 54 245 52T270 48T333 46H360V0H348Q324 3 182 3Q51 3 36 0H25V46H58Q100 47 109 49T128 61V619Z"></path></g></g></g></g></svg></mjx-container></span> molecule can be shown as:<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-08.jpg?height=107&width=435&top_left_y=794&top_left_x=956" alt="" data-align="center" /></figure></li> <li>Note that the charges depicted on H and F are partial (represented by <span class="math-inline " data-overflow="visible"> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.023ex;" width="1.005ex" height="1.645ex" role="img" focusable="false" viewbox="0 -717 444 727"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="1D6FF" d="M195 609Q195 656 227 686T302 717Q319 716 351 709T407 697T433 690Q451 682 451 662Q451 644 438 628T403 612Q382 612 348 641T288 671T249 657T235 628Q235 584 334 463Q401 379 401 292Q401 169 340 80T205 -10H198Q127 -10 83 36T36 153Q36 286 151 382Q191 413 252 434Q252 435 245 449T230 481T214 521T201 566T195 609ZM112 130Q112 83 136 55T204 27Q233 27 256 51T291 111T309 178T316 232Q316 267 309 298T295 344T269 400L259 396Q215 381 183 342T137 256T118 179T112 130Z"></path></g></g></g></svg></mjx-container></span> ) and therefore the bond is not ionic. However, due to the charge separation, the bond is said to be polar and is classified as polar covalent bond.</li> <li>The ability of an element to attract electrons to itself in a chemical bond (which results in polar and ionic bonds) is called electronegativity.</li> <li>Electronegativity was quantified by Linus Pauling by comparing the bond energies of of a heteronuclear diatomic molecule (such as HF) with bond energies of its homonuclear counterparts (such as <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="2.685ex" height="1.885ex" role="img" focusable="false" viewbox="0 -683 1186.6 833"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g></g></g></svg></mjx-container></span> and <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="2.465ex" height="1.878ex" role="img" focusable="false" viewbox="0 -680 1089.6 830"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="46" d="M128 619Q121 626 117 628T101 631T58 634H25V680H582V676Q584 670 596 560T610 444V440H570V444Q563 493 561 501Q555 538 543 563T516 601T477 622T431 631T374 633H334H286Q252 633 244 631T233 621Q232 619 232 490V363H284Q287 363 303 363T327 364T349 367T372 373T389 385Q407 403 410 459V480H450V200H410V221Q407 276 389 296Q381 303 371 307T348 313T327 316T303 317T284 317H232V189L233 61Q240 54 245 52T270 48T333 46H360V0H348Q324 3 182 3Q51 3 36 0H25V46H58Q100 47 109 49T128 61V619Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(686,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g></g></g></svg></mjx-container></span> ). Through such comparisons, electronegativity values were assigned to elements as shown in table below:</li> </ul> <div class="table_tabular" style="text-align: center"> <div class="inline-tabular"><table class="tabular"> <tbody> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">H 2.20</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; " class="_empty"></td> <td style="text-align: center; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom: none !important; border-top: none !important; border-top-style: solid !important; border-top-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; " colspan="15"></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">He n.a.</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Li</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Be</td> <td style="text-align: center; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom: none !important; border-top: none !important; width: auto; border-bottom-style: solid !important; border-bottom-width: 1px !important; " colspan="10" rowspan="3"></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">B 2.04</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">C 2.55</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">N 3.04</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">0 3.44</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">F 3.98</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Ne n.a.</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Na</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Mg</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Al</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Si</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">P</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">s</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Cl</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Ar</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">0.93</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.31</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.61</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.90</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.19</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.58</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">3.16</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">n.a.</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">K</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Ca</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Sc</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Ti</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">V</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; " class="_empty"></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Mn</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Fe</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Co</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Ni</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Cu</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Zn</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.023ex;" width="3.31ex" height="1.6ex" role="img" focusable="false" viewbox="0 -697 1463 707"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="1D406" d="M465 -10Q281 -10 173 88T64 343Q64 413 85 471T143 568T217 631T298 670Q371 697 449 697Q452 697 459 697T470 696Q502 696 531 690T582 675T618 658T644 641T656 632L732 695Q734 697 745 697Q758 697 761 692T765 668V627V489V449Q765 428 761 424T741 419H731H724Q705 419 702 422T695 444Q683 520 631 577T495 635Q364 635 295 563Q261 528 247 477T232 343Q232 296 236 260T256 185T296 120T366 76T472 52Q481 51 498 51Q544 51 573 67T607 108Q608 111 608 164V214H464V276H479Q506 273 680 273Q816 273 834 276H845V214H765V113V51Q765 16 763 8T750 0Q742 2 709 16T658 40L648 46Q592 -10 465 -10Z"></path></g><g data-mml-node="mi" transform="translate(904,0)"><path data-c="1D41A" d="M64 349Q64 399 107 426T255 453Q346 453 402 423T473 341Q478 327 478 310T479 196V77Q493 63 529 62Q549 62 553 57T558 31Q558 9 552 5T514 0H497H481Q375 0 367 56L356 46Q300 -6 210 -6Q130 -6 81 30T32 121Q32 188 111 226T332 272H350V292Q350 313 348 327T337 361T306 391T248 402T194 399H189Q204 376 204 354Q204 327 187 306T134 284Q97 284 81 305T64 349ZM164 121Q164 89 186 67T238 45Q274 45 307 63T346 108L350 117V226H347Q248 218 206 189T164 121Z"></path></g></g></g></g></svg></mjx-container></span></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Ge</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">As</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Se</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Br</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Kr</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">0.82</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.00</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.36</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.54</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.63</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.66</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.55</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.83</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.88</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.91</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.90</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.65</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.81</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.01</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.18</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.55</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.96</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">3.00</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Rb</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Sr</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Y</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Zr</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Nb</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Mo</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Tc</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Ru</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Rh</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Pd</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Ag</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Cd</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">In</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Sn</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Sb</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Te</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">I</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Xe</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">0.82</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">0.95</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.22</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.33</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.60</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.16</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.90</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.20</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.28</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.20</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.93</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.69</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.78</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.96</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.05</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.10</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.66</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.60</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Cs</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Ba</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">La</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Hf</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Ta</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">W</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Re</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Os</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Ir</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Pt</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Au</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Hg</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Tl</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Pb</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Bi</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Po</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">At</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Rn</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">0.79</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">0.89</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.10</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.30</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.50</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.36</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.90</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.20</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.20</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.28</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.54</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.00</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.62</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.33</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.02</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.00</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">2.20</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">n.a.</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Fr 0.70</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Ra 0.89</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Ac 1.10</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Rf n.a.</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Db n.a.</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Sg n.a.</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Bh n.a.</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">,</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Mt n.a.</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">L</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Rg n.a.</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Uub n.a</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-08.jpg?height=25&width=29&top_left_y=2217&top_left_x=1333" alt="" data-align="center" /></figure></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Uuq n.a. n.a.</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">□</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">-</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">L</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; " class="_empty"></td> </tr> </tbody> </table> </div></div> <h2 type="section" data-unnumbered="true" id="electronegativity-%5C%26-bond-polarity-2" class="section-title"> ELECTRONEGATIVITY & BOND POLARITY</h2> <ul> <li>The following trends can be summarized for electronegativities of main-group elements:</li> <li>Electronegativity generally increases across a period in the periodic table.</li> <li>Electronegativity generally decreases down a group in the periodic table.</li> <li>Fluorine is the most electronegative element.</li> <li>Francium is the least electronegative element (sometimes called most electropositive)</li> <li>The periodic trends in electronegativity are consistent with other periodic trends studied earlier. In general, electronegativity is inversely proportional to atomic size-the larger the atom, the less ability it has to attract electrons to itself in a chemical bond.</li> <li>The degree of polarity in a chemical bond depends on the electronegativity difference ( <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: 0;" width="5.122ex" height="1.62ex" role="img" focusable="false" viewbox="0 -716 2264 716"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="394" d="M51 0Q46 4 46 7Q46 9 215 357T388 709Q391 716 416 716Q439 716 444 709Q447 705 616 357T786 7Q786 4 781 0H51ZM507 344L384 596L137 92L383 91H630Q630 93 507 344Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(833,0)"><g data-mml-node="mi"><path data-c="45" d="M128 619Q121 626 117 628T101 631T58 634H25V680H597V676Q599 670 611 560T625 444V440H585V444Q584 447 582 465Q578 500 570 526T553 571T528 601T498 619T457 629T411 633T353 634Q266 634 251 633T233 622Q233 622 233 621Q232 619 232 497V376H286Q359 378 377 385Q413 401 416 469Q416 471 416 473V493H456V213H416V233Q415 268 408 288T383 317T349 328T297 330Q290 330 286 330H232V196V114Q232 57 237 52Q243 47 289 47H340H391Q428 47 452 50T505 62T552 92T584 146Q594 172 599 200T607 247T612 270V273H652V270Q651 267 632 137T610 3V0H25V46H58Q100 47 109 49T128 61V619Z"></path><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z" transform="translate(681,0)"></path></g></g></g></g></svg></mjx-container></span> ) between the two bonding atoms. The polarity of a bond is quantified by the size of its dipole moment ( <span class="math-inline " data-overflow="visible"> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.489ex;" width="1.364ex" height="1.489ex" role="img" focusable="false" viewbox="0 -442 603 658"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="1D707" d="M58 -216Q44 -216 34 -208T23 -186Q23 -176 96 116T173 414Q186 442 219 442Q231 441 239 435T249 423T251 413Q251 401 220 279T187 142Q185 131 185 107V99Q185 26 252 26Q261 26 270 27T287 31T302 38T315 45T327 55T338 65T348 77T356 88T365 100L372 110L408 253Q444 395 448 404Q461 431 491 431Q504 431 512 424T523 412T525 402L449 84Q448 79 448 68Q448 43 455 35T476 26Q485 27 496 35Q517 55 537 131Q543 151 547 152Q549 153 557 153H561Q580 153 580 144Q580 138 575 117T555 63T523 13Q510 0 491 -8Q483 -10 467 -10Q446 -10 429 -4T402 11T385 29T376 44T374 51L368 45Q362 39 350 30T324 12T288 -4T246 -11Q199 -11 153 12L129 -85Q108 -167 104 -180T92 -202Q76 -216 58 -216Z"></path></g></g></g></svg></mjx-container></span> ).</li> <li>Dipole moment occurs when there is a separation of positive and negative charge in a bond. The greater the electronegativity difference between the atoms forming the bond ( <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: 0;" width="5.122ex" height="1.62ex" role="img" focusable="false" viewbox="0 -716 2264 716"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="394" d="M51 0Q46 4 46 7Q46 9 215 357T388 709Q391 716 416 716Q439 716 444 709Q447 705 616 357T786 7Q786 4 781 0H51ZM507 344L384 596L137 92L383 91H630Q630 93 507 344Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(833,0)"><g data-mml-node="mi"><path data-c="45" d="M128 619Q121 626 117 628T101 631T58 634H25V680H597V676Q599 670 611 560T625 444V440H585V444Q584 447 582 465Q578 500 570 526T553 571T528 601T498 619T457 629T411 633T353 634Q266 634 251 633T233 622Q233 622 233 621Q232 619 232 497V376H286Q359 378 377 385Q413 401 416 469Q416 471 416 473V493H456V213H416V233Q415 268 408 288T383 317T349 328T297 330Q290 330 286 330H232V196V114Q232 57 237 52Q243 47 289 47H340H391Q428 47 452 50T505 62T552 92T584 146Q594 172 599 200T607 247T612 270V273H652V270Q651 267 632 137T610 3V0H25V46H58Q100 47 109 49T128 61V619Z"></path><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z" transform="translate(681,0)"></path></g></g></g></g></svg></mjx-container></span> ), the greater the dipole moment. For example:</li> </ul> <div class="table_tabular" style="text-align: center"> <div class="inline-tabular"><table class="tabular"> <tbody> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">TABLE 9.2</td> <td style="text-align: left; border-left: none !important; border-bottom: none !important; border-top: none !important; border-top-style: solid !important; border-top-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; " colspan="2"><div class="inline-tabular sub-table"><table class="tabular"> <tbody> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-bottom: none !important; border-top: none !important; width: auto; vertical-align: middle; ">Dipole Moments of Several</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-bottom: none !important; border-top: none !important; width: auto; vertical-align: middle; ">Molecules in the Gas Phase</td> </tr> </tbody> </table> </div></td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Molecule</td> <td style="text-align: center; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline " data-overflow="visible"> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: 0;" width="1.885ex" height="1.62ex" role="img" focusable="false" viewbox="0 -716 833 716"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="394" d="M51 0Q46 4 46 7Q46 9 215 357T388 709Q391 716 416 716Q439 716 444 709Q447 705 616 357T786 7Q786 4 781 0H51ZM507 344L384 596L137 92L383 91H630Q630 93 507 344Z"></path></g></g></g></svg></mjx-container></span> EN</td> <td style="text-align: center; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Dipole Moment (D)</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="3.25ex" height="1.934ex" role="img" focusable="false" viewbox="0 -705 1436.6 855"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(722,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1033,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g></g></g></svg></mjx-container></span></td> <td style="text-align: center; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">0</td> <td style="text-align: center; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">0</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">ClF</td> <td style="text-align: center; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.0</td> <td style="text-align: center; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">0.88</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">HF</td> <td style="text-align: center; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.9</td> <td style="text-align: center; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1.82</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">LiF</td> <td style="text-align: center; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">3.0</td> <td style="text-align: center; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">6.33</td> </tr> </tbody> </table> </div></div> <ul> <li>This relationship between electronegativity of atoms and polarity of bonds between them can be summarized as shown below:</li> </ul> <div class="table_tabular" style="text-align: center"> <div class="inline-tabular"><table class="tabular"> <tbody> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: center; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; "><div class="inline-tabular sub-table"><table class="tabular"> <tbody> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: center; border-left: none !important; border-bottom: none !important; border-top: none !important; width: auto; vertical-align: middle; ">The greater the <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: 0;" width="5.122ex" height="1.62ex" role="img" focusable="false" viewbox="0 -716 2264 716"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="394" d="M51 0Q46 4 46 7Q46 9 215 357T388 709Q391 716 416 716Q439 716 444 709Q447 705 616 357T786 7Q786 4 781 0H51ZM507 344L384 596L137 92L383 91H630Q630 93 507 344Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(833,0)"><g data-mml-node="mi"><path data-c="45" d="M128 619Q121 626 117 628T101 631T58 634H25V680H597V676Q599 670 611 560T625 444V440H585V444Q584 447 582 465Q578 500 570 526T553 571T528 601T498 619T457 629T411 633T353 634Q266 634 251 633T233 622Q233 622 233 621Q232 619 232 497V376H286Q359 378 377 385Q413 401 416 469Q416 471 416 473V493H456V213H416V233Q415 268 408 288T383 317T349 328T297 330Q290 330 286 330H232V196V114Q232 57 237 52Q243 47 289 47H340H391Q428 47 452 50T505 62T552 92T584 146Q594 172 599 200T607 247T612 270V273H652V270Q651 267 632 137T610 3V0H25V46H58Q100 47 109 49T128 61V619Z"></path><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z" transform="translate(681,0)"></path></g></g></g></g></svg></mjx-container></span></td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: center; border-left: none !important; border-bottom: none !important; border-top: none !important; width: auto; vertical-align: middle; ">for the elements</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: center; border-left: none !important; border-bottom: none !important; border-top: none !important; width: auto; vertical-align: middle; ">forming the bond</td> </tr> </tbody> </table> </div></td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: center; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom: none !important; border-top: none !important; width: auto; vertical-align: middle; "><div class="inline-tabular sub-table"><table class="tabular"> <tbody> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: center; border-left: none !important; border-bottom: none !important; border-top: none !important; width: auto; vertical-align: middle; ">The larger the</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: center; border-left: none !important; border-bottom: none !important; border-top: none !important; width: auto; vertical-align: middle; ">dipole moment</td> </tr> </tbody> </table> </div></td> </tr> </tbody> </table> </div><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.025ex;" width="17.167ex" height="3.518ex" role="img" focusable="false" 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46H276V0H267Q249 3 140 3Q37 3 28 0H20V46H36Z" transform="translate(3555,0)"></path><path data-c="65" d="M28 218Q28 273 48 318T98 391T163 433T229 448Q282 448 320 430T378 380T406 316T415 245Q415 238 408 231H126V216Q126 68 226 36Q246 30 270 30Q312 30 342 62Q359 79 369 104L379 128Q382 131 395 131H398Q415 131 415 121Q415 117 412 108Q393 53 349 21T250 -11Q155 -11 92 58T28 218ZM333 275Q322 403 238 411H236Q228 411 220 410T195 402T166 381T143 340T127 274V267H333V275Z" transform="translate(3947,0)"></path><path data-c="20" d="" transform="translate(4391,0)"></path><path data-c="70" d="M36 -148H50Q89 -148 97 -134V-126Q97 -119 97 -107T97 -77T98 -38T98 6T98 55T98 106Q98 140 98 177T98 243T98 296T97 335T97 351Q94 370 83 376T38 385H20V408Q20 431 22 431L32 432Q42 433 61 434T98 436Q115 437 135 438T165 441T176 442H179V416L180 390L188 397Q247 441 326 441Q407 441 464 377T522 216Q522 115 457 52T310 -11Q242 -11 190 33L182 40V-45V-101Q182 -128 184 -134T195 -145Q216 -148 244 -148H260V-194H252L228 -193Q205 -192 178 -192T140 -191Q37 -191 28 -194H20V-148H36ZM424 218Q424 292 390 347T305 402Q234 402 182 337V98Q222 26 294 26Q345 26 384 80T424 218Z" transform="translate(4641,0)"></path><path data-c="6F" d="M28 214Q28 309 93 378T250 448Q340 448 405 380T471 215Q471 120 407 55T250 -10Q153 -10 91 57T28 214ZM250 30Q372 30 372 193V225V250Q372 272 371 288T364 326T348 362T317 390T268 410Q263 411 252 411Q222 411 195 399Q152 377 139 338T126 246V226Q126 130 145 91Q177 30 250 30Z" transform="translate(5197,0)"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(5697,0)"></path><path data-c="61" d="M137 305T115 305T78 320T63 359Q63 394 97 421T218 448Q291 448 336 416T396 340Q401 326 401 309T402 194V124Q402 76 407 58T428 40Q443 40 448 56T453 109V145H493V106Q492 66 490 59Q481 29 455 12T400 -6T353 12T329 54V58L327 55Q325 52 322 49T314 40T302 29T287 17T269 6T247 -2T221 -8T190 -11Q130 -11 82 20T34 107Q34 128 41 147T68 188T116 225T194 253T304 268H318V290Q318 324 312 340Q290 411 215 411Q197 411 181 410T156 406T148 403Q170 388 170 359Q170 334 154 320ZM126 106Q126 75 150 51T209 26Q247 26 276 49T315 109Q317 116 318 175Q318 233 317 233Q309 233 296 232T251 223T193 203T147 166T126 106Z" transform="translate(5975,0)"></path><path data-c="72" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T98 122T98 161T98 203Q98 234 98 269T98 328L97 351Q94 370 83 376T38 385H20V408Q20 431 22 431L32 432Q42 433 60 434T96 436Q112 437 131 438T160 441T171 442H174V373Q213 441 271 441H277Q322 441 343 419T364 373Q364 352 351 337T313 322Q288 322 276 338T263 372Q263 381 265 388T270 400T273 405Q271 407 250 401Q234 393 226 386Q179 341 179 207V154Q179 141 179 127T179 101T180 81T180 66V61Q181 59 183 57T188 54T193 51T200 49T207 48T216 47T225 47T235 46T245 46H276V0H267Q249 3 140 3Q37 3 28 0H20V46H36Z" transform="translate(6475,0)"></path><path data-c="A0" d="" transform="translate(6867,0)"></path></g></g></g></g></g></g></svg></mjx-container></span></div> <h2 type="section" data-unnumbered="true" id="electronegativity-and-bond-polarity" class="section-title"> ELECTRONEGATIVITY AND BOND POLARITY</h2> <ul> <li>The bond forming between two atoms can be classified based on the magnitude of the <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: 0;" width="5.122ex" height="1.62ex" role="img" focusable="false" viewbox="0 -716 2264 716"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="394" d="M51 0Q46 4 46 7Q46 9 215 357T388 709Q391 716 416 716Q439 716 444 709Q447 705 616 357T786 7Q786 4 781 0H51ZM507 344L384 596L137 92L383 91H630Q630 93 507 344Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(833,0)"><g data-mml-node="mi"><path data-c="45" d="M128 619Q121 626 117 628T101 631T58 634H25V680H597V676Q599 670 611 560T625 444V440H585V444Q584 447 582 465Q578 500 570 526T553 571T528 601T498 619T457 629T411 633T353 634Q266 634 251 633T233 622Q233 622 233 621Q232 619 232 497V376H286Q359 378 377 385Q413 401 416 469Q416 471 416 473V493H456V213H416V233Q415 268 408 288T383 317T349 328T297 330Q290 330 286 330H232V196V114Q232 57 237 52Q243 47 289 47H340H391Q428 47 452 50T505 62T552 92T584 146Q594 172 599 200T607 247T612 270V273H652V270Q651 267 632 137T610 3V0H25V46H58Q100 47 109 49T128 61V619Z"></path><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z" transform="translate(681,0)"></path></g></g></g></g></svg></mjx-container></span>. The table below lists the parameters of this classification:</li> </ul> <div class="table_tabular" style="text-align: center"> <div class="inline-tabular"><table class="tabular"> <tbody> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom: none !important; border-top: none !important; border-top-style: solid !important; border-top-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; " colspan="3">TABLE 9.1 The Effect of Electronegativity Difference on Bond Type</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Electronegativity Difference ( <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: 0;" width="5.122ex" height="1.62ex" role="img" focusable="false" viewbox="0 -716 2264 716"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="394" d="M51 0Q46 4 46 7Q46 9 215 357T388 709Q391 716 416 716Q439 716 444 709Q447 705 616 357T786 7Q786 4 781 0H51ZM507 344L384 596L137 92L383 91H630Q630 93 507 344Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(833,0)"><g data-mml-node="mi"><path data-c="45" d="M128 619Q121 626 117 628T101 631T58 634H25V680H597V676Q599 670 611 560T625 444V440H585V444Q584 447 582 465Q578 500 570 526T553 571T528 601T498 619T457 629T411 633T353 634Q266 634 251 633T233 622Q233 622 233 621Q232 619 232 497V376H286Q359 378 377 385Q413 401 416 469Q416 471 416 473V493H456V213H416V233Q415 268 408 288T383 317T349 328T297 330Q290 330 286 330H232V196V114Q232 57 237 52Q243 47 289 47H340H391Q428 47 452 50T505 62T552 92T584 146Q594 172 599 200T607 247T612 270V273H652V270Q651 267 632 137T610 3V0H25V46H58Q100 47 109 49T128 61V619Z"></path><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z" transform="translate(681,0)"></path></g></g></g></g></svg></mjx-container></span> )</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Bond Type</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Example</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Small (0-0.4)</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Covalent</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="3.25ex" height="1.934ex" role="img" focusable="false" viewbox="0 -705 1436.6 855"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(722,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1033,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g></g></g></svg></mjx-container></span></td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Intermediate (0.4-2.0)</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Polar covalent</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">HCl</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Large (2.0+)</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Ionic</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">NaCl</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">c. 2014 Peason Education, Inc:</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; " class="_empty"></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; " class="_empty"></td> </tr> </tbody> </table> </div></div> <div><figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-10.jpg?height=557&width=922&top_left_y=816&top_left_x=640" alt="" data-align="center" /></figure></div> <ul> <li>The diagram below shows the percent ionic character of several diatomic gas-phase molecules. As can be expected, as the electronegativity difference between the bonding atoms increases, percent ionic character generally increases.</li> <li>Also, as can be seen, no bond is <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.127ex;" width="5.278ex" height="1.824ex" role="img" focusable="false" viewbox="0 -750 2333 806"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mn"><path data-c="31" d="M213 578L200 573Q186 568 160 563T102 556H83V602H102Q149 604 189 617T245 641T273 663Q275 666 285 666Q294 666 302 660V361L303 61Q310 54 315 52T339 48T401 46H427V0H416Q395 3 257 3Q121 3 100 0H88V46H114Q136 46 152 46T177 47T193 50T201 52T207 57T213 61V578Z"></path><path data-c="30" d="M96 585Q152 666 249 666Q297 666 345 640T423 548Q460 465 460 320Q460 165 417 83Q397 41 362 16T301 -15T250 -22Q224 -22 198 -16T137 16T82 83Q39 165 39 320Q39 494 96 585ZM321 597Q291 629 250 629Q208 629 178 597Q153 571 145 525T137 333Q137 175 145 125T181 46Q209 16 250 16Q290 16 318 46Q347 76 354 130T362 333Q362 478 354 524T321 597Z" transform="translate(500,0)"></path><path data-c="30" d="M96 585Q152 666 249 666Q297 666 345 640T423 548Q460 465 460 320Q460 165 417 83Q397 41 362 16T301 -15T250 -22Q224 -22 198 -16T137 16T82 83Q39 165 39 320Q39 494 96 585ZM321 597Q291 629 250 629Q208 629 178 597Q153 571 145 525T137 333Q137 175 145 125T181 46Q209 16 250 16Q290 16 318 46Q347 76 354 130T362 333Q362 478 354 524T321 597Z" transform="translate(1000,0)"></path></g><g data-mml-node="mi" transform="translate(1500,0)"><path data-c="25" d="M465 605Q428 605 394 614T340 632T319 641Q332 608 332 548Q332 458 293 403T202 347Q145 347 101 402T56 548Q56 637 101 693T202 750Q241 750 272 719Q359 642 464 642Q580 642 650 732Q662 748 668 749Q670 750 673 750Q682 750 688 743T693 726Q178 -47 170 -52Q166 -56 160 -56Q147 -56 142 -45Q137 -36 142 -27Q143 -24 363 304Q469 462 525 546T581 630Q528 605 465 605ZM207 385Q235 385 263 427T292 548Q292 617 267 664T200 712Q193 712 186 709T167 698T147 668T134 615Q132 595 132 548V527Q132 436 165 403Q183 385 203 385H207ZM500 146Q500 234 544 290T647 347Q699 347 737 292T776 146T737 0T646 -56Q590 -56 545 0T500 146ZM651 -18Q679 -18 707 24T736 146Q736 215 711 262T644 309Q637 309 630 306T611 295T591 265T578 212Q577 200 577 146V124Q577 -18 647 -18H651Z"></path></g></g></g></svg></mjx-container></span> ionic. In general, bonds with more than <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.127ex;" width="4.147ex" height="1.824ex" role="img" focusable="false" viewbox="0 -750 1833 806"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mn"><path data-c="35" d="M164 157Q164 133 148 117T109 101H102Q148 22 224 22Q294 22 326 82Q345 115 345 210Q345 313 318 349Q292 382 260 382H254Q176 382 136 314Q132 307 129 306T114 304Q97 304 95 310Q93 314 93 485V614Q93 664 98 664Q100 666 102 666Q103 666 123 658T178 642T253 634Q324 634 389 662Q397 666 402 666Q410 666 410 648V635Q328 538 205 538Q174 538 149 544L139 546V374Q158 388 169 396T205 412T256 420Q337 420 393 355T449 201Q449 109 385 44T229 -22Q148 -22 99 32T50 154Q50 178 61 192T84 210T107 214Q132 214 148 197T164 157Z"></path><path data-c="30" d="M96 585Q152 666 249 666Q297 666 345 640T423 548Q460 465 460 320Q460 165 417 83Q397 41 362 16T301 -15T250 -22Q224 -22 198 -16T137 16T82 83Q39 165 39 320Q39 494 96 585ZM321 597Q291 629 250 629Q208 629 178 597Q153 571 145 525T137 333Q137 175 145 125T181 46Q209 16 250 16Q290 16 318 46Q347 76 354 130T362 333Q362 478 354 524T321 597Z" transform="translate(500,0)"></path></g><g data-mml-node="mi" transform="translate(1000,0)"><path data-c="25" d="M465 605Q428 605 394 614T340 632T319 641Q332 608 332 548Q332 458 293 403T202 347Q145 347 101 402T56 548Q56 637 101 693T202 750Q241 750 272 719Q359 642 464 642Q580 642 650 732Q662 748 668 749Q670 750 673 750Q682 750 688 743T693 726Q178 -47 170 -52Q166 -56 160 -56Q147 -56 142 -45Q137 -36 142 -27Q143 -24 363 304Q469 462 525 546T581 630Q528 605 465 605ZM207 385Q235 385 263 427T292 548Q292 617 267 664T200 712Q193 712 186 709T167 698T147 668T134 615Q132 595 132 548V527Q132 436 165 403Q183 385 203 385H207ZM500 146Q500 234 544 290T647 347Q699 347 737 292T776 146T737 0T646 -56Q590 -56 545 0T500 146ZM651 -18Q679 -18 707 24T736 146Q736 215 711 262T644 309Q637 309 630 306T611 295T591 265T578 212Q577 200 577 146V124Q577 -18 647 -18H651Z"></path></g></g></g></svg></mjx-container></span> ionic character are classified as ionic.<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-10.jpg?height=697&width=996&top_left_y=1755&top_left_x=983" alt="" data-align="center" /></figure></li> </ul> <h2 type="section" data-unnumbered="true" id="examples%3A-3" class="section-title"> Examples:</h2> <ol> <li>Determine whether each bond listed below is non-polar covalent, polar covalent or ionic.</li> </ol> <div>Sr-F N-Cl N-O<br /> 2) Draw Lewis structure for BrF with an arrow representing the dipole moment.</div> <h2 type="section" data-unnumbered="true" id="writing-lewis-structures-for-molecular-compounds-%5C%26-polyatomic-ions" class="section-title"> WRITING LEWIS STRUCTURES FOR MOLECULAR COMPOUNDS & POLYATOMIC IONS</h2> <ul> <li>Lewis structures for molecular compounds and polyatomic ions can be drawn according to the following steps:</li> </ul> <ol> <li>Count the total number of valence electrons to be used in the structure. For ions, add one electron for each negative charge, and subtract one electron for each positive charge.</li> <li>Write a skeleton structure, arranging the atoms in the most symmetrical pattern. Remember the number of bonds commonly formed by atoms.</li> <li>Connect each atom by a dashed line representing 2 electrons each.</li> <li>Determine the number of electrons left by subtracting number of electrons used from the total determined in step 1.</li> <li>Distribute the remaining electrons around the atoms in pairs in order to achieve eight electrons around each (octet rule). Hydrogen is an exception (doublet).</li> <li>If there are not enough electrons to achieve octet rule for each atom, form double or triple bonds by sharing more than one pair of electrons.</li> </ol> <h2 type="section" data-unnumbered="true" id="examples%3A-4" class="section-title"> Examples:</h2> <div>Draw Lewis structure for each molecule or ion, using the step-wise procedure outlined above:</div> <ol> <li><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="6.078ex" height="1.934ex" role="img" focusable="false" viewbox="0 -705 2686.6 855"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1186.6,0)"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z" transform="translate(722,0)"></path></g></g></g></g></svg></mjx-container></span></li> </ol> <div>Total number of electrons: <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.14ex;" width="4.525ex" height="0.084ex" role="img" focusable="false" viewbox="0 25 2000 37"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="5F" d="M0 -62V-25H499V-62H0Z"></path></g><g data-mml-node="mi" transform="translate(500,0)"><path data-c="5F" d="M0 -62V-25H499V-62H0Z"></path></g><g data-mml-node="mi" transform="translate(1000,0)"><path data-c="5F" d="M0 -62V-25H499V-62H0Z"></path></g><g data-mml-node="mi" transform="translate(1500,0)"><path data-c="5F" d="M0 -62V-25H499V-62H0Z"></path></g></g></g></svg></mjx-container></span><br /> 2) <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.05ex;" width="5.455ex" height="1.96ex" role="img" focusable="false" viewbox="0 -844.3 2411.1 866.3"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msup"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(722,0)"></path><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z" transform="translate(1000,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1811,432.1) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mo"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g></g></g></g></g></svg></mjx-container></span></div> <div>Total number of electrons: <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.14ex;" width="4.525ex" height="0.084ex" role="img" focusable="false" viewbox="0 25 2000 37"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="5F" d="M0 -62V-25H499V-62H0Z"></path></g><g data-mml-node="mi" transform="translate(500,0)"><path data-c="5F" d="M0 -62V-25H499V-62H0Z"></path></g><g data-mml-node="mi" transform="translate(1000,0)"><path data-c="5F" d="M0 -62V-25H499V-62H0Z"></path></g><g data-mml-node="mi" transform="translate(1500,0)"><path data-c="5F" d="M0 -62V-25H499V-62H0Z"></path></g></g></g></svg></mjx-container></span><br /> 3) <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="5.369ex" height="1.885ex" role="img" focusable="false" viewbox="0 -683 2373.1 833"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g><g data-mml-node="msub" transform="translate(1186.6,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="34" d="M462 0Q444 3 333 3Q217 3 199 0H190V46H221Q241 46 248 46T265 48T279 53T286 61Q287 63 287 115V165H28V211L179 442Q332 674 334 675Q336 677 355 677H373L379 671V211H471V165H379V114Q379 73 379 66T385 54Q393 47 442 46H471V0H462ZM293 211V545L74 212L183 211H293Z"></path></g></g></g></g></g></svg></mjx-container></span></div> <div>Total number of electrons: <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.14ex;" width="4.525ex" height="0.084ex" role="img" focusable="false" viewbox="0 25 2000 37"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="5F" d="M0 -62V-25H499V-62H0Z"></path></g><g data-mml-node="mi" transform="translate(500,0)"><path data-c="5F" d="M0 -62V-25H499V-62H0Z"></path></g><g data-mml-node="mi" transform="translate(1000,0)"><path data-c="5F" d="M0 -62V-25H499V-62H0Z"></path></g><g data-mml-node="mi" transform="translate(1500,0)"><path data-c="5F" d="M0 -62V-25H499V-62H0Z"></path></g></g></g></svg></mjx-container></span></div> <h2 type="section" data-unnumbered="true" id="resonance-structures" class="section-title"> RESONANCE STRUCTURES</h2> <ul> <li>When writing Lewis structures, it might be possible to write more than one good (valid) structure for some molecules. For example, when writing Lewis structure for <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.375ex;" width="2.748ex" height="1.97ex" role="img" focusable="false" viewbox="0 -705 1214.6 870.6"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(811,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="33" d="M127 463Q100 463 85 480T69 524Q69 579 117 622T233 665Q268 665 277 664Q351 652 390 611T430 522Q430 470 396 421T302 350L299 348Q299 347 308 345T337 336T375 315Q457 262 457 175Q457 96 395 37T238 -22Q158 -22 100 21T42 130Q42 158 60 175T105 193Q133 193 151 175T169 130Q169 119 166 110T159 94T148 82T136 74T126 70T118 67L114 66Q165 21 238 21Q293 21 321 74Q338 107 338 175V195Q338 290 274 322Q259 328 213 329L171 330L168 332Q166 335 166 348Q166 366 174 366Q202 366 232 371Q266 376 294 413T322 525V533Q322 590 287 612Q265 626 240 626Q208 626 181 615T143 592T132 580H135Q138 579 143 578T153 573T165 566T175 555T183 540T186 520Q186 498 172 481T127 463Z"></path></g></g></g></g></g></svg></mjx-container></span>, we can draw two correct structures, with the double bond on alternate sides:<br /> <div class="smiles-inline" style="display: inline-block;"><svg id="smiles-mjrskucvilz9ii27s" viewbox="0 0 185 77.1375245302555" style="width: 185.07603772844402px; 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"></text><text x="92.53803302677437" y="38.568749999999994" class="element-mjrskucvilz9ii27s" fill="currentColor" style="text-anchor: start; glyph-orientation-vertical: 0; writing-mode: vertical-rl; text-orientation: upright; letter-spacing: -1px; direction: rtl; unicode-bidi: bidi-override;"><tspan>O</tspan></text><text x="92.53803302677437" y="28.049999999999997" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text><text x="63.1125" y="56.09997546973496" class="element-mjrskucvilz9ii27s" fill="currentColor" style="text-anchor: start; writing-mode: horizontal-tb; text-orientation: mixed; letter-spacing: normal; direction: rtl; unicode-bidi: bidi-override;"><tspan>O</tspan></text><text x="56.099999999999994" y="49.087475469734954" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text></g></svg></div><br /> <div class="smiles-inline" style="display: inline-block;"><svg id="smiles-mjrskucxoiurty3ckko" viewbox="0 0 154 56.10001888340316" style="width: 154.27499999999574px; height: 56.10001888340316px; overflow: visible;"><defs><lineargradient id="line-mjrskucxoiurty3ckko-1" gradientunits="userSpaceOnUse" x1="56.10000169950628" y1="24.263250000000376" x2="98.17500169950205" y2="24.263268883403548"><stop stop-color="currentColor" offset="20%"></stop><stop stop-color="currentColor" offset="100%"></stop></lineargradient><lineargradient id="line-mjrskucxoiurty3ckko-3" gradientunits="userSpaceOnUse" x1="56.09999830049371" y1="31.83674999999962" x2="98.17499830048948" y2="31.836768883402776"><stop stop-color="currentColor" offset="20%"></stop><stop stop-color="currentColor" offset="100%"></stop></lineargradient></defs><mask id="text-mask-mjrskucxoiurty3ckko"><rect x="0" y="0" width="100%" height="100%" fill="white"></rect><circle cx="98.17499999999575" cy="28.050018883403162" r="10.518749999999999" fill="black"></circle><circle cx="56.099999999999994" cy="28.049999999999997" r="10.518749999999999" fill="black"></circle></mask><style>/*<![CDATA[*/ .element-mjrskucxoiurty3ckko { font: 18.7px Helvetica, Arial, sans-serif; alignment-baseline: 'middle'; } .sub-mjrskucxoiurty3ckko { font: 11.219999999999999px Helvetica, Arial, sans-serif; } /*]]>*/</style><g mask="url(#text-mask-mjrskucxoiurty3ckko)"><line x1="56.10000169950628" y1="24.263250000000376" x2="98.17500169950205" y2="24.263268883403548" style="stroke-linecap:round;stroke-dasharray:none;stroke-width:1.6829999999999998" stroke="url('#line-mjrskucxoiurty3ckko-1')"></line><line x1="56.09999830049371" y1="31.83674999999962" x2="98.17499830048948" y2="31.836768883402776" style="stroke-linecap:round;stroke-dasharray:none;stroke-width:1.6829999999999998" stroke="url('#line-mjrskucxoiurty3ckko-3')"></line></g><g><text x="92.91562499999574" y="35.06251888340316" class="element-mjrskucxoiurty3ckko" fill="currentColor" style="text-anchor: start; writing-mode: horizontal-tb; text-orientation: mixed; letter-spacing: normal; direction: ltr;"><tspan>O</tspan></text><text x="98.17499999999575" y="28.050018883403162" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text><text x="63.1125" y="35.0625" class="element-mjrskucxoiurty3ckko" fill="currentColor" style="text-anchor: start; writing-mode: horizontal-tb; text-orientation: mixed; letter-spacing: normal; direction: rtl; unicode-bidi: bidi-override;"><tspan>O</tspan></text><text x="56.099999999999994" y="28.049999999999997" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text></g></svg></div></li> <li>In cases such as this--where more there are more than one valid Lewis structures for the same molecule-we find that in nature, the molecule exists an average of the two structures. Both structures above predict the molecule to possess one double bond and one single bond. However, experimental results indicate that the bonds in <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.375ex;" width="2.748ex" height="1.97ex" role="img" focusable="false" viewbox="0 -705 1214.6 870.6"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(811,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="33" d="M127 463Q100 463 85 480T69 524Q69 579 117 622T233 665Q268 665 277 664Q351 652 390 611T430 522Q430 470 396 421T302 350L299 348Q299 347 308 345T337 336T375 315Q457 262 457 175Q457 96 395 37T238 -22Q158 -22 100 21T42 130Q42 158 60 175T105 193Q133 193 151 175T169 130Q169 119 166 110T159 94T148 82T136 74T126 70T118 67L114 66Q165 21 238 21Q293 21 321 74Q338 107 338 175V195Q338 290 274 322Q259 328 213 329L171 330L168 332Q166 335 166 348Q166 366 174 366Q202 366 232 371Q266 376 294 413T322 525V533Q322 590 287 612Q265 626 240 626Q208 626 181 615T143 592T132 580H135Q138 579 143 578T153 573T165 566T175 555T183 540T186 520Q186 498 172 481T127 463Z"></path></g></g></g></g></g></svg></mjx-container></span> are equivalent and each is intermediate in strength and length between a double bond and a single bond.</li> <li>Therefore, we represent the molecule with both structures, called resonance structures, with a double-headed arrow between them.<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-13.jpg?height=109&width=826&top_left_y=1125&top_left_x=683" alt="" data-align="center" /></figure></li> <li>A resonance structure is one of two or more structures that have the same skeletal formula, but different electron arrangements. The actual structure of the molecule is intermediate between the two or more resonance structures and is called a resonance hybrid.</li> </ul> <div class="table" number="2"> <div class="figure_img" style="text-align: center;"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-13.jpg?height=400&width=554&top_left_y=1480&top_left_x=534" alt="" style="max-width: 100%;" /></div><div class="caption_figure">Hybrid<br /> (a)</div></div> <div class="table" number="3"> <div class="figure_img" style="text-align: center;"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-13.jpg?height=248&width=501&top_left_y=1581&top_left_x=1203" alt="" style="max-width: 100%;" /></div><div class="caption_figure">Resonance hybrid structure<br /> (b)</div></div> <ul> <li>In Lewis model, the electrons are represented as localized either on one atom (lone pair) or between atoms (bonding pair). However, in nature, electrons are in molecules are often delocalized over seveal atoms or bonds. The delocalization of electrons lowers their potential energy and stabilizes them.</li> <li>Resonance structures attempt to more accurately reflect the delocalization of electrons in a molecule. The resulting stabilization of the electrons through delocalization is called resonance stabilization, and makes an important contribution to the stability of many molecules.</li> </ul> <h2 type="section" data-unnumbered="true" id="resonance-structures-2" class="section-title"> RESONANCE STRUCTURES</h2> <ul> <li>When writing resonance structures, it is important to note that the positions of the bonding and non-bonding electrons change, but the arrangement of the atoms remains the same.</li> <li>For example, the resonance structures in ozone are formed by moving the electrons, as indicated by the red arrows.<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-14.jpg?height=257&width=957&top_left_y=644&top_left_x=623" alt="" data-align="center" /></figure></li> <li>The resonance hybrid that actually exists is written as follows, indicating that the dotted electrons are delocalized and exist on all three oxygen atoms.<br 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<li>Identify which of the following structures are resonance structures:<br /> (a) <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.564ex;" width="12.446ex" height="2.877ex" role="img" focusable="false" viewbox="0 -1022 5501.1 1271.5"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mo" transform="translate(0 -0.5)"><path data-c="7C" d="M139 -249H137Q125 -249 119 -235V251L120 737Q130 750 139 750Q152 750 159 735V-235Q151 -249 141 -249H139Z"></path></g><g data-mml-node="mover" transform="translate(278,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z"></path></g></g><g data-mml-node="mo" transform="translate(0,637)"><svg width="778" height="237" x="0" y="148" viewbox="194.5 148 778 237"><path data-c="2013" d="M0 248V285H499V248H0Z" transform="scale(2.334,1)"></path></svg></g></g><g data-mml-node="mo" transform="translate(1333.8,0)"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347Q722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153Q722 140 707 133H70Q56 140 56 153Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2389.6,0)"><g data-mml-node="mi"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 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data-mml-node="mo" transform="translate(5223.1,0) translate(0 -0.5)"><path data-c="7C" d="M139 -249H137Q125 -249 119 -235V251L120 737Q130 750 139 750Q152 750 159 735V-235Q151 -249 141 -249H139Z"></path></g></g></g></svg></mjx-container></span><br /> (b) <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.564ex;" width="12.446ex" height="2.827ex" role="img" focusable="false" viewbox="0 -1000 5501.1 1249.5"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mo" transform="translate(0 -0.5)"><path data-c="7C" d="M139 -249H137Q125 -249 119 -235V251L120 737Q130 750 139 750Q152 750 159 735V-235Q151 -249 141 -249H139Z"></path></g><g data-mml-node="mover" transform="translate(278,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z"></path></g></g><g data-mml-node="mo" transform="translate(0,615)"><svg width="750" height="237" x="0" y="148" viewbox="187.5 148 750 237"><path data-c="2013" d="M0 248V285H499V248H0Z" transform="scale(2.25,1)"></path></svg></g></g><g data-mml-node="mo" transform="translate(1305.8,0)"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347Q722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153Q722 140 707 133H70Q56 140 56 153Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2361.6,0)"><g data-mml-node="mi"><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z"></path></g></g><g data-mml-node="mo" transform="translate(3417.3,0)"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347Q722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153Q722 140 707 133H70Q56 140 56 153Z"></path></g><g data-mml-node="mover" transform="translate(4473.1,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z"></path></g></g><g data-mml-node="mo" transform="translate(0,615)"><svg width="750" 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250ZM56 56Q56 71 72 76H706Q722 70 722 56Q722 44 707 36H70Q56 43 56 56Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(4362,0)"><g data-mml-node="mi"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z"></path></g></g><g data-mml-node="mo" transform="translate(5112,0) translate(0 -0.5)"><path data-c="7C" d="M139 -249H137Q125 -249 119 -235V251L120 737Q130 750 139 750Q152 750 159 735V-235Q151 -249 141 -249H139Z"></path></g></g></g></svg></mjx-container></span></li> </ol> <h2 type="section" data-unnumbered="true" id="formal-charges" class="section-title"> FORMAL CHARGES</h2> <ul> <li>When the resonance structures for a molecule are equivalent (equally valid), the true structure (resonance hybrid) is an equally weighted average of these structures.</li> <li>In many cases, resonance structures can be written that are not equivalent. For reasons that will be discussed shortly (formal charges), one possible structure may be better than another. In these cases, the resonance hybrid is still the average of the possible structures, but the better resonance structure contributes more to the true structure.</li> <li>Formal charge is a fictitious charge assigned to each atom in a Lewis structure that helps to distinguish among competing Lewis structures. The formal charge of an atom in a Lewis structure is the charge it would have if all the bonding electrons were shared equally between the bonded atoms.</li> <li>For example, for HF , even though we know that that F is more electronegative than H , and therefore has a partial negative charge, the formal charges are assigned by ignoring the difference in electronegativity of H and F .<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-15.jpg?height=173&width=641&top_left_y=1181&top_left_x=741" alt="" data-align="center" /></figure></li> <li>Formal charge on an atom can be calculated as shown below:</li> </ul> <div>Formal charge <span class="math-inline " data-overflow="visible"> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="1.76ex" height="1.505ex" role="img" focusable="false" viewbox="0 -583 778 665"><g stroke="currentColor" fill="currentColor" stroke-width="0" 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198 26Q295 26 295 104Q295 133 277 151Q257 175 194 187T111 210Q75 227 54 256T33 318Q33 357 50 384T93 424T143 442T187 447H198Q238 447 268 432L283 424L292 431Q302 440 314 448H322H326Q329 448 335 442V310L329 304H301Q295 310 295 316Z" transform="translate(12092,0)"></path><path data-c="29" d="M60 749L64 750Q69 750 74 750H86L114 726Q208 641 251 514T294 250Q294 182 284 119T261 12T224 -76T186 -143T145 -194T113 -227T90 -246Q87 -249 86 -250H74Q66 -250 63 -250T58 -247T55 -238Q56 -237 66 -225Q221 -64 221 250T66 725Q56 737 55 738Q55 746 60 749Z" transform="translate(12486,0)"></path><path data-c="A0" d="" transform="translate(12875,0)"></path></g></g></g></svg></mjx-container></span></div> <ul> <li>Formal charge for H and F can be calculated as shown below:<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-15.jpg?height=267&width=847&top_left_y=1828&top_left_x=608" alt="" data-align="center" /></figure><br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-15.jpg?height=233&width=889&top_left_y=2137&top_left_x=605" alt="" data-align="center" /></figure></li> </ul> <h2 type="section" data-unnumbered="true" id="formal-charges-2" class="section-title"> FORMAL CHARGES</h2> <ul> <li>The concept of formal charges can be used to distinguish between competing skeletal structures or competing resonance structures. In general, the following four rules apply to assigning formal charges:</li> </ul> <ol> <li>The sum of all formal charges in a neutral molecule must be zero.</li> <li>The sum of all formal charges in an ion must equal the charge of the ion.</li> <li>Small (or zero) formal charges on individual atoms are better than large ones.</li> <li>When formal charge cannot be avoided, negative formal charges must reside on the most electronegative atom.</li> </ol> <ul> <li>The table below shows how formal charges can be used to determine which skeletal structure for HCN is best (most stable). Note that both skeletal structures satisfy the octed rule equally.</li> </ul> <div class="table_tabular" style="text-align: center"> <div class="inline-tabular"><table class="tabular"> <tbody> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; " class="_empty"></td> <td style="text-align: center; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom: none !important; border-top: none !important; border-top-style: solid !important; border-top-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; " colspan="4">Structure A</td> <td style="text-align: center; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom: none !important; border-top: none !important; border-top-style: solid !important; border-top-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; " colspan="5">Structure B</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; " class="_empty"></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">H</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">-</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">C</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">N :</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">H</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">-</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">N</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">三</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">C:</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">number of valence <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.025ex;" width="2.437ex" height="1.779ex" role="img" focusable="false" viewbox="0 -775.2 1077.1 786.2"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msup"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="65" d="M28 218Q28 273 48 318T98 391T163 433T229 448Q282 448 320 430T378 380T406 316T415 245Q415 238 408 231H126V216Q126 68 226 36Q246 30 270 30Q312 30 342 62Q359 79 369 104L379 128Q382 131 395 131H398Q415 131 415 121Q415 117 412 108Q393 53 349 21T250 -11Q155 -11 92 58T28 218ZM333 275Q322 403 238 411H236Q228 411 220 410T195 402T166 381T143 340T127 274V267H333V275Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(477,363) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mo"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g></g></g></g></g></svg></mjx-container></span></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; " class="_empty"></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">4</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">5</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">1</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; " class="_empty"></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">5</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; " class="_empty"></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">4</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">- number of nonbonding <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.025ex;" width="2.437ex" height="1.779ex" role="img" focusable="false" viewbox="0 -775.2 1077.1 786.2"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msup"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="65" d="M28 218Q28 273 48 318T98 391T163 433T229 448Q282 448 320 430T378 380T406 316T415 245Q415 238 408 231H126V216Q126 68 226 36Q246 30 270 30Q312 30 342 62Q359 79 369 104L379 128Q382 131 395 131H398Q415 131 415 121Q415 117 412 108Q393 53 349 21T250 -11Q155 -11 92 58T28 218ZM333 275Q322 403 238 411H236Q228 411 220 410T195 402T166 381T143 340T127 274V267H333V275Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(477,363) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mo"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g></g></g></g></g></svg></mjx-container></span></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">-0</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; " class="_empty"></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">-0</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">-2</td> <td style="text-align: left; 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border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.781ex;" width="6.447ex" height="2.737ex" role="img" focusable="false" viewbox="0 -864.9 2849.6 1209.9"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mo"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="mfrac" transform="translate(778,0)"><g data-mml-node="mn" transform="translate(220,394) scale(0.707)"><path data-c="31" d="M213 578L200 573Q186 568 160 563T102 556H83V602H102Q149 604 189 617T245 641T273 663Q275 666 285 666Q294 666 302 660V361L303 61Q310 54 315 52T339 48T401 46H427V0H416Q395 3 257 3Q121 3 100 0H88V46H114Q136 46 152 46T177 47T193 50T201 52T207 57T213 61V578Z"></path></g><g data-mml-node="mn" transform="translate(220,-345) scale(0.707)"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g><rect width="553.6" height="60" x="120" y="220"></rect></g><g data-mml-node="mo" transform="translate(1571.6,0)"><path data-c="28" d="M94 250Q94 319 104 381T127 488T164 576T202 643T244 695T277 729T302 750H315H319Q333 750 333 741Q333 738 316 720T275 667T226 581T184 443T167 250T184 58T225 -81T274 -167T316 -220T333 -241Q333 -250 318 -250H315H302L274 -226Q180 -141 137 -14T94 250Z"></path></g><g data-mml-node="mn" transform="translate(1960.6,0)"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g><g data-mml-node="mo" transform="translate(2460.6,0)"><path data-c="29" d="M60 749L64 750Q69 750 74 750H86L114 726Q208 641 251 514T294 250Q294 182 284 119T261 12T224 -76T186 -143T145 -194T113 -227T90 -246Q87 -249 86 -250H74Q66 -250 63 -250T58 -247T55 -238Q56 -237 66 -225Q221 -64 221 250T66 725Q56 737 55 738Q55 746 60 749Z"></path></g></g></g></svg></mjx-container></span></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; " class="_empty"></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.781ex;" width="6.447ex" height="2.737ex" role="img" focusable="false" viewbox="0 -864.9 2849.6 1209.9"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mo"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="mfrac" transform="translate(778,0)"><g data-mml-node="mn" transform="translate(220,394) scale(0.707)"><path data-c="31" d="M213 578L200 573Q186 568 160 563T102 556H83V602H102Q149 604 189 617T245 641T273 663Q275 666 285 666Q294 666 302 660V361L303 61Q310 54 315 52T339 48T401 46H427V0H416Q395 3 257 3Q121 3 100 0H88V46H114Q136 46 152 46T177 47T193 50T201 52T207 57T213 61V578Z"></path></g><g data-mml-node="mn" transform="translate(220,-345) scale(0.707)"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g><rect width="553.6" height="60" x="120" y="220"></rect></g><g data-mml-node="mo" transform="translate(1571.6,0)"><path data-c="28" d="M94 250Q94 319 104 381T127 488T164 576T202 643T244 695T277 729T302 750H315H319Q333 750 333 741Q333 738 316 720T275 667T226 581T184 443T167 250T184 58T225 -81T274 -167T316 -220T333 -241Q333 -250 318 -250H315H302L274 -226Q180 -141 137 -14T94 250Z"></path></g><g data-mml-node="mn" transform="translate(1960.6,0)"><path data-c="38" d="M70 417T70 494T124 618T248 666Q319 666 374 624T429 515Q429 485 418 459T392 417T361 389T335 371T324 363L338 354Q352 344 366 334T382 323Q457 264 457 174Q457 95 399 37T249 -22Q159 -22 101 29T43 155Q43 263 172 335L154 348Q133 361 127 368Q70 417 70 494ZM286 386L292 390Q298 394 301 396T311 403T323 413T334 425T345 438T355 454T364 471T369 491T371 513Q371 556 342 586T275 624Q268 625 242 625Q201 625 165 599T128 534Q128 511 141 492T167 463T217 431Q224 426 228 424L286 386ZM250 21Q308 21 350 55T392 137Q392 154 387 169T375 194T353 216T330 234T301 253T274 270Q260 279 244 289T218 306L210 311Q204 311 181 294T133 239T107 157Q107 98 150 60T250 21Z"></path></g><g data-mml-node="mo" transform="translate(2460.6,0)"><path data-c="29" d="M60 749L64 750Q69 750 74 750H86L114 726Q208 641 251 514T294 250Q294 182 284 119T261 12T224 -76T186 -143T145 -194T113 -227T90 -246Q87 -249 86 -250H74Q66 -250 63 -250T58 -247T55 -238Q56 -237 66 -225Q221 -64 221 250T66 725Q56 737 55 738Q55 746 60 749Z"></path></g></g></g></svg></mjx-container></span></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; " class="_empty"></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.781ex;" width="6.447ex" height="2.737ex" role="img" focusable="false" viewbox="0 -864.9 2849.6 1209.9"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mo"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="mfrac" transform="translate(778,0)"><g data-mml-node="mn" transform="translate(220,394) scale(0.707)"><path data-c="31" d="M213 578L200 573Q186 568 160 563T102 556H83V602H102Q149 604 189 617T245 641T273 663Q275 666 285 666Q294 666 302 660V361L303 61Q310 54 315 52T339 48T401 46H427V0H416Q395 3 257 3Q121 3 100 0H88V46H114Q136 46 152 46T177 47T193 50T201 52T207 57T213 61V578Z"></path></g><g data-mml-node="mn" transform="translate(220,-345) scale(0.707)"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g><rect width="553.6" height="60" x="120" y="220"></rect></g><g data-mml-node="mo" transform="translate(1571.6,0)"><path data-c="28" d="M94 250Q94 319 104 381T127 488T164 576T202 643T244 695T277 729T302 750H315H319Q333 750 333 741Q333 738 316 720T275 667T226 581T184 443T167 250T184 58T225 -81T274 -167T316 -220T333 -241Q333 -250 318 -250H315H302L274 -226Q180 -141 137 -14T94 250Z"></path></g><g data-mml-node="mn" transform="translate(1960.6,0)"><path data-c="36" d="M42 313Q42 476 123 571T303 666Q372 666 402 630T432 550Q432 525 418 510T379 495Q356 495 341 509T326 548Q326 592 373 601Q351 623 311 626Q240 626 194 566Q147 500 147 364L148 360Q153 366 156 373Q197 433 263 433H267Q313 433 348 414Q372 400 396 374T435 317Q456 268 456 210V192Q456 169 451 149Q440 90 387 34T253 -22Q225 -22 199 -14T143 16T92 75T56 172T42 313ZM257 397Q227 397 205 380T171 335T154 278T148 216Q148 133 160 97T198 39Q222 21 251 21Q302 21 329 59Q342 77 347 104T352 209Q352 289 347 316T329 361Q302 397 257 397Z"></path></g><g data-mml-node="mo" transform="translate(2460.6,0)"><path data-c="29" d="M60 749L64 750Q69 750 74 750H86L114 726Q208 641 251 514T294 250Q294 182 284 119T261 12T224 -76T186 -143T145 -194T113 -227T90 -246Q87 -249 86 -250H74Q66 -250 63 -250T58 -247T55 -238Q56 -237 66 -225Q221 -64 221 250T66 725Q56 737 55 738Q55 746 60 749Z"></path></g></g></g></svg></mjx-container></span></td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">Formal charge</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">0</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; " class="_empty"></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">0</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">0</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">0</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; " class="_empty"></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">+1</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; " class="_empty"></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">-1</td> </tr> </tbody> </table> </div></div> <div>© 2014 Pearson Education, Inc.</div> <h2 type="section" data-unnumbered="true" id="examples%3A-6" class="section-title"> Examples:</h2> <ol> <li>Assign formal charges to each atom in the resonance structures of the cyanate ion ( <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.05ex;" width="6.523ex" height="1.96ex" role="img" focusable="false" viewbox="0 -844.3 2883.1 866.3"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msup"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z"></path><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z" transform="translate(778,0)"></path><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z" transform="translate(1500,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(2283,432.1) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mo"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g></g></g></g></g></svg></mjx-container></span>) shown below. Which resonance structure is likely to contribute to the correct structure of the ion?<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-16.jpg?height=158&width=1037&top_left_y=1804&top_left_x=779" alt="" data-align="center" /></figure></li> </ol> <h2 type="section" data-unnumbered="true" id="formal-charges-3" class="section-title"> FORMAL CHARGES</h2> <h2 type="section" data-unnumbered="true" id="examples-(cont'd)%3A" class="section-title"> Examples (cont'd):</h2> <ol start="2"> <li>Draw the Lewis structure (including resonance structures) for nitromethane ( <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.375ex;" width="8.763ex" height="1.97ex" role="img" focusable="false" viewbox="0 -705 3873.1 870.6"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z" transform="translate(722,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1505,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="33" d="M127 463Q100 463 85 480T69 524Q69 579 117 622T233 665Q268 665 277 664Q351 652 390 611T430 522Q430 470 396 421T302 350L299 348Q299 347 308 345T337 336T375 315Q457 262 457 175Q457 96 395 37T238 -22Q158 -22 100 21T42 130Q42 158 60 175T105 193Q133 193 151 175T169 130Q169 119 166 110T159 94T148 82T136 74T126 70T118 67L114 66Q165 21 238 21Q293 21 321 74Q338 107 338 175V195Q338 290 274 322Q259 328 213 329L171 330L168 332Q166 335 166 348Q166 366 174 366Q202 366 232 371Q266 376 294 413T322 525V533Q322 590 287 612Q265 626 240 626Q208 626 181 615T143 592T132 580H135Q138 579 143 578T153 573T165 566T175 555T183 540T186 520Q186 498 172 481T127 463Z"></path></g></g></g><g data-mml-node="msub" transform="translate(1908.6,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z"></path><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z" transform="translate(750,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1561,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g></g></g></svg></mjx-container></span> ), and assign formal charges to each atom that has a formal charge. Which structure is favored?<br /> (The skeleton structure for nitromethane is shown below).</li> </ol> <div><span class="math-block "> <mjx-container class="MathJax" jax="SVG" display="true"><svg style="vertical-align: -3.733ex;" width="14.541ex" height="8.597ex" role="img" focusable="false" viewbox="0 -2150 6427 3800"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mtable"><g data-mml-node="mtr" transform="translate(0,1400)"><g data-mml-node="mtd" transform="translate(444,0)"></g><g data-mml-node="mtd" transform="translate(1888,0)"><g data-mml-node="mi"><path data-c="1D43B" d="M228 637Q194 637 192 641Q191 643 191 649Q191 673 202 682Q204 683 219 683Q260 681 355 681Q389 681 418 681T463 682T483 682Q499 682 499 672Q499 670 497 658Q492 641 487 638H485Q483 638 480 638T473 638T464 637T455 637Q416 636 405 634T387 623Q384 619 355 500Q348 474 340 442T328 395L324 380Q324 378 469 378H614L615 381Q615 384 646 504Q674 619 674 627T617 637Q594 637 587 639T580 648Q580 650 582 660Q586 677 588 679T604 682Q609 682 646 681T740 680Q802 680 835 681T871 682Q888 682 888 672Q888 645 876 638H874Q872 638 869 638T862 638T853 637T844 637Q805 636 794 634T776 623Q773 618 704 340T634 58Q634 51 638 51Q646 48 692 46H723Q729 38 729 37T726 19Q722 6 716 0H701Q664 2 567 2Q533 2 504 2T458 2T437 1Q420 1 420 10Q420 15 423 24Q428 43 433 45Q437 46 448 46H454Q481 46 514 49Q520 50 522 50T528 55T534 64T540 82T547 110T558 153Q565 181 569 198Q602 330 602 331T457 332H312L279 197Q245 63 245 58Q245 51 253 49T303 46H334Q340 38 340 37T337 19Q333 6 327 0H312Q275 2 178 2Q144 2 115 2T69 2T48 1Q31 1 31 10Q31 12 34 24Q39 43 44 45Q48 46 59 46H65Q92 46 125 49Q139 52 144 61Q147 65 216 339T285 628Q285 635 228 637Z"></path></g></g><g data-mml-node="mtd" transform="translate(3838.5,0)"><g data-mml-node="mi"><path data-c="1D442" d="M740 435Q740 320 676 213T511 42T304 -22Q207 -22 138 35T51 201Q50 209 50 244Q50 346 98 438T227 601Q351 704 476 704Q514 704 524 703Q621 689 680 617T740 435ZM637 476Q637 565 591 615T476 665Q396 665 322 605Q242 542 200 428T157 216Q157 126 200 73T314 19Q404 19 485 98T608 313Q637 408 637 476Z"></path></g></g><g data-mml-node="mtd" transform="translate(6045.5,0)"></g></g><g data-mml-node="mtr"><g data-mml-node="mtd"><g data-mml-node="mi"><path data-c="1D43B" d="M228 637Q194 637 192 641Q191 643 191 649Q191 673 202 682Q204 683 219 683Q260 681 355 681Q389 681 418 681T463 682T483 682Q499 682 499 672Q499 670 497 658Q492 641 487 638H485Q483 638 480 638T473 638T464 637T455 637Q416 636 405 634T387 623Q384 619 355 500Q348 474 340 442T328 395L324 380Q324 378 469 378H614L615 381Q615 384 646 504Q674 619 674 627T617 637Q594 637 587 639T580 648Q580 650 582 660Q586 677 588 679T604 682Q609 682 646 681T740 680Q802 680 835 681T871 682Q888 682 888 672Q888 645 876 638H874Q872 638 869 638T862 638T853 637T844 637Q805 636 794 634T776 623Q773 618 704 340T634 58Q634 51 638 51Q646 48 692 46H723Q729 38 729 37T726 19Q722 6 716 0H701Q664 2 567 2Q533 2 504 2T458 2T437 1Q420 1 420 10Q420 15 423 24Q428 43 433 45Q437 46 448 46H454Q481 46 514 49Q520 50 522 50T528 55T534 64T540 82T547 110T558 153Q565 181 569 198Q602 330 602 331T457 332H312L279 197Q245 63 245 58Q245 51 253 49T303 46H334Q340 38 340 37T337 19Q333 6 327 0H312Q275 2 178 2Q144 2 115 2T69 2T48 1Q31 1 31 10Q31 12 34 24Q39 43 44 45Q48 46 59 46H65Q92 46 125 49Q139 52 144 61Q147 65 216 339T285 628Q285 635 228 637Z"></path></g></g><g data-mml-node="mtd" transform="translate(1952,0)"><g data-mml-node="mi"><path data-c="1D436" d="M50 252Q50 367 117 473T286 641T490 704Q580 704 633 653Q642 643 648 636T656 626L657 623Q660 623 684 649Q691 655 699 663T715 679T725 690L740 705H746Q760 705 760 698Q760 694 728 561Q692 422 692 421Q690 416 687 415T669 413H653Q647 419 647 422Q647 423 648 429T650 449T651 481Q651 552 619 605T510 659Q484 659 454 652T382 628T299 572T226 479Q194 422 175 346T156 222Q156 108 232 58Q280 24 350 24Q441 24 512 92T606 240Q610 253 612 255T628 257Q648 257 648 248Q648 243 647 239Q618 132 523 55T319 -22Q206 -22 128 53T50 252Z"></path></g></g><g data-mml-node="mtd" transform="translate(3776,0)"><g data-mml-node="mi"><path data-c="1D441" d="M234 637Q231 637 226 637Q201 637 196 638T191 649Q191 676 202 682Q204 683 299 683Q376 683 387 683T401 677Q612 181 616 168L670 381Q723 592 723 606Q723 633 659 637Q635 637 635 648Q635 650 637 660Q641 676 643 679T653 683Q656 683 684 682T767 680Q817 680 843 681T873 682Q888 682 888 672Q888 650 880 642Q878 637 858 637Q787 633 769 597L620 7Q618 0 599 0Q585 0 582 2Q579 5 453 305L326 604L261 344Q196 88 196 79Q201 46 268 46H278Q284 41 284 38T282 19Q278 6 272 0H259Q228 2 151 2Q123 2 100 2T63 2T46 1Q31 1 31 10Q31 14 34 26T39 40Q41 46 62 46Q130 49 150 85Q154 91 221 362L289 634Q287 635 234 637Z"></path></g></g><g data-mml-node="mtd" transform="translate(5664,0)"><g data-mml-node="mi"><path data-c="1D442" d="M740 435Q740 320 676 213T511 42T304 -22Q207 -22 138 35T51 201Q50 209 50 244Q50 346 98 438T227 601Q351 704 476 704Q514 704 524 703Q621 689 680 617T740 435ZM637 476Q637 565 591 615T476 665Q396 665 322 605Q242 542 200 428T157 216Q157 126 200 73T314 19Q404 19 485 98T608 313Q637 408 637 476Z"></path></g></g></g><g data-mml-node="mtr" transform="translate(0,-1400)"><g data-mml-node="mtd" transform="translate(444,0)"></g><g data-mml-node="mtd" transform="translate(1888,0)"><g data-mml-node="mi"><path data-c="1D43B" d="M228 637Q194 637 192 641Q191 643 191 649Q191 673 202 682Q204 683 219 683Q260 681 355 681Q389 681 418 681T463 682T483 682Q499 682 499 672Q499 670 497 658Q492 641 487 638H485Q483 638 480 638T473 638T464 637T455 637Q416 636 405 634T387 623Q384 619 355 500Q348 474 340 442T328 395L324 380Q324 378 469 378H614L615 381Q615 384 646 504Q674 619 674 627T617 637Q594 637 587 639T580 648Q580 650 582 660Q586 677 588 679T604 682Q609 682 646 681T740 680Q802 680 835 681T871 682Q888 682 888 672Q888 645 876 638H874Q872 638 869 638T862 638T853 637T844 637Q805 636 794 634T776 623Q773 618 704 340T634 58Q634 51 638 51Q646 48 692 46H723Q729 38 729 37T726 19Q722 6 716 0H701Q664 2 567 2Q533 2 504 2T458 2T437 1Q420 1 420 10Q420 15 423 24Q428 43 433 45Q437 46 448 46H454Q481 46 514 49Q520 50 522 50T528 55T534 64T540 82T547 110T558 153Q565 181 569 198Q602 330 602 331T457 332H312L279 197Q245 63 245 58Q245 51 253 49T303 46H334Q340 38 340 37T337 19Q333 6 327 0H312Q275 2 178 2Q144 2 115 2T69 2T48 1Q31 1 31 10Q31 12 34 24Q39 43 44 45Q48 46 59 46H65Q92 46 125 49Q139 52 144 61Q147 65 216 339T285 628Q285 635 228 637Z"></path></g></g><g data-mml-node="mtd" transform="translate(4220,0)"></g><g data-mml-node="mtd" transform="translate(6045.5,0)"></g></g></g></g></g></svg></mjx-container></span></div> <ol start="3"> <li>Use formal charges to determine which structure shown below is better.<br /> <div class="smiles-inline" style="display: inline-block;"><svg id="smiles-mjrskud2uidc0pf57tg" viewbox="0 0 185 77.1375245302555" style="width: 185.07603772844402px; height: 77.1375245302555px; overflow: 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cy="28.049999999999997" r="10.518749999999999" fill="black"></circle></mask><style>/*<![CDATA[*/ .element-mjrskud3z4dkqs9ntzf { font: 18.7px Helvetica, Arial, sans-serif; alignment-baseline: 'middle'; } .sub-mjrskud3z4dkqs9ntzf { font: 11.219999999999999px Helvetica, Arial, sans-serif; } /*]]>*/</style><g mask="url(#text-mask-mjrskud3z4dkqs9ntzf)"><line x1="56.099999999999994" y1="28.049999999999997" x2="98.17499999999575" y2="28.050018883403162" style="stroke-linecap:round;stroke-dasharray:none;stroke-width:1.6829999999999998" stroke="url('#line-mjrskud3z4dkqs9ntzf-1')"></line></g><g><text x="98.17499999999575" y="28.050018883403162" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text><text x="63.1125" y="35.0625" class="element-mjrskud3z4dkqs9ntzf" fill="currentColor" style="text-anchor: start; writing-mode: horizontal-tb; text-orientation: mixed; letter-spacing: normal; direction: rtl; unicode-bidi: bidi-override;"><tspan>S</tspan><tspan style="unicode-bidi: plaintext;">H</tspan></text><text x="56.099999999999994" y="28.049999999999997" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text></g></svg></div></li> </ol> <h2 type="section" data-unnumbered="true" id="exceptions-to-the-octed-rule" class="section-title"> EXCEPTIONS TO THE OCTED RULE</h2> <ul> <li>The octet rule in the Lewis model has some exceptions. These exceptions are discussed below.</li> </ul> <h2 type="section" data-unnumbered="true" id="odd-electron-species%3A" class="section-title"> Odd-Electron Species:</h2> <ul> <li>Molecules and ions with odd number of electrons in their Lewis structures are called free radicals. For example, nitrogen monoxide- a pollutant formed in auto exhaust-has 11 electrons in its Lewis structure. The Lewis structure for this molecule, therefore, has an odd electron and cannot achieve octet for both atoms.<br /> <div class="smiles-inline" style="display: inline-block;"><svg id="smiles-mjrskud4yg1jz1gistq" viewbox="0 0 154 56.10001888340316" style="width: 154.27499999999574px; height: 56.10001888340316px; overflow: visible;"><defs><lineargradient id="line-mjrskud4yg1jz1gistq-1" gradientunits="userSpaceOnUse" x1="56.10000169950628" y1="24.263250000000376" x2="98.17500169950205" y2="24.263268883403548"><stop stop-color="currentColor" offset="20%"></stop><stop stop-color="currentColor" offset="100%"></stop></lineargradient><lineargradient id="line-mjrskud4yg1jz1gistq-3" gradientunits="userSpaceOnUse" x1="56.09999830049371" y1="31.83674999999962" x2="98.17499830048948" y2="31.836768883402776"><stop stop-color="currentColor" offset="20%"></stop><stop stop-color="currentColor" offset="100%"></stop></lineargradient></defs><mask id="text-mask-mjrskud4yg1jz1gistq"><rect x="0" y="0" width="100%" height="100%" fill="white"></rect><circle cx="98.17499999999575" cy="28.050018883403162" r="10.518749999999999" fill="black"></circle><circle cx="56.099999999999994" cy="28.049999999999997" r="10.518749999999999" fill="black"></circle></mask><style>/*<![CDATA[*/ .element-mjrskud4yg1jz1gistq { font: 18.7px Helvetica, Arial, sans-serif; alignment-baseline: 'middle'; } .sub-mjrskud4yg1jz1gistq { font: 11.219999999999999px Helvetica, Arial, sans-serif; } /*]]>*/</style><g mask="url(#text-mask-mjrskud4yg1jz1gistq)"><line x1="56.10000169950628" y1="24.263250000000376" x2="98.17500169950205" y2="24.263268883403548" style="stroke-linecap:round;stroke-dasharray:none;stroke-width:1.6829999999999998" stroke="url('#line-mjrskud4yg1jz1gistq-1')"></line><line x1="56.09999830049371" y1="31.83674999999962" x2="98.17499830048948" y2="31.836768883402776" style="stroke-linecap:round;stroke-dasharray:none;stroke-width:1.6829999999999998" stroke="url('#line-mjrskud4yg1jz1gistq-3')"></line></g><g><text x="92.91562499999574" y="35.06251888340316" class="element-mjrskud4yg1jz1gistq" fill="currentColor" style="text-anchor: start; writing-mode: horizontal-tb; text-orientation: mixed; letter-spacing: normal; direction: ltr;"><tspan>N</tspan></text><text x="98.17499999999575" y="28.050018883403162" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text><text x="63.1125" y="35.0625" class="element-mjrskud4yg1jz1gistq" fill="currentColor" style="text-anchor: start; writing-mode: horizontal-tb; text-orientation: mixed; letter-spacing: normal; direction: rtl; unicode-bidi: bidi-override;"><tspan>O<tspan baseline-shift="super" class="sub-mjrskud4yg1jz1gistq">+</tspan></tspan><tspan style="unicode-bidi: plaintext;">H</tspan></text><text x="56.099999999999994" y="28.049999999999997" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text></g></svg></div></li> <li>Free radicals tend to be unstable and reactive. For example, NO reacts with oxygen to form <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="4.445ex" height="1.934ex" role="img" focusable="false" viewbox="0 -705 1964.6 855"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z"></path><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z" transform="translate(750,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1561,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g></g></g></svg></mjx-container></span> (also an odd-electron molecule), with resonance structure shown below:<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-18.jpg?height=145&width=672&top_left_y=1250&top_left_x=837" alt="" data-align="center" /></figure></li> </ul> <h2 type="section" data-unnumbered="true" id="incomplete-octet%3A" class="section-title"> Incomplete Octet:</h2> <ul> <li>Another exception to the octet rule involves elements that tend to form incomplete octets. The most important of these is boron, which fomrs compounds with only six electrons around B . For example <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.375ex;" width="4.067ex" height="1.92ex" role="img" focusable="false" viewbox="0 -683 1797.6 848.6"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="42" d="M131 622Q124 629 120 631T104 634T61 637H28V683H229H267H346Q423 683 459 678T531 651Q574 627 599 590T624 512Q624 461 583 419T476 360L466 357Q539 348 595 302T651 187Q651 119 600 67T469 3Q456 1 242 0H28V46H61Q103 47 112 49T131 61V622ZM511 513Q511 560 485 594T416 636Q415 636 403 636T371 636T333 637Q266 637 251 636T232 628Q229 624 229 499V374H312L396 375L406 377Q410 378 417 380T442 393T474 417T499 456T511 513ZM537 188Q537 239 509 282T430 336L329 337H229V200V116Q229 57 234 52Q240 47 334 47H383Q425 47 443 53Q486 67 511 104T537 188Z"></path><path data-c="46" d="M128 619Q121 626 117 628T101 631T58 634H25V680H582V676Q584 670 596 560T610 444V440H570V444Q563 493 561 501Q555 538 543 563T516 601T477 622T431 631T374 633H334H286Q252 633 244 631T233 621Q232 619 232 490V363H284Q287 363 303 363T327 364T349 367T372 373T389 385Q407 403 410 459V480H450V200H410V221Q407 276 389 296Q381 303 371 307T348 313T327 316T303 317T284 317H232V189L233 61Q240 54 245 52T270 48T333 46H360V0H348Q324 3 182 3Q51 3 36 0H25V46H58Q100 47 109 49T128 61V619Z" transform="translate(708,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1394,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="33" d="M127 463Q100 463 85 480T69 524Q69 579 117 622T233 665Q268 665 277 664Q351 652 390 611T430 522Q430 470 396 421T302 350L299 348Q299 347 308 345T337 336T375 315Q457 262 457 175Q457 96 395 37T238 -22Q158 -22 100 21T42 130Q42 158 60 175T105 193Q133 193 151 175T169 130Q169 119 166 110T159 94T148 82T136 74T126 70T118 67L114 66Q165 21 238 21Q293 21 321 74Q338 107 338 175V195Q338 290 274 322Q259 328 213 329L171 330L168 332Q166 335 166 348Q166 366 174 366Q202 366 232 371Q266 376 294 413T322 525V533Q322 590 287 612Q265 626 240 626Q208 626 181 615T143 592T132 580H135Q138 579 143 578T153 573T165 566T175 555T183 540T186 520Q186 498 172 481T127 463Z"></path></g></g></g></g></g></svg></mjx-container></span> and <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.375ex;" width="4.286ex" height="1.92ex" role="img" focusable="false" viewbox="0 -683 1894.6 848.6"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="42" d="M131 622Q124 629 120 631T104 634T61 637H28V683H229H267H346Q423 683 459 678T531 651Q574 627 599 590T624 512Q624 461 583 419T476 360L466 357Q539 348 595 302T651 187Q651 119 600 67T469 3Q456 1 242 0H28V46H61Q103 47 112 49T131 61V622ZM511 513Q511 560 485 594T416 636Q415 636 403 636T371 636T333 637Q266 637 251 636T232 628Q229 624 229 499V374H312L396 375L406 377Q410 378 417 380T442 393T474 417T499 456T511 513ZM537 188Q537 239 509 282T430 336L329 337H229V200V116Q229 57 234 52Q240 47 334 47H383Q425 47 443 53Q486 67 511 104T537 188Z"></path><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z" transform="translate(708,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1491,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="33" d="M127 463Q100 463 85 480T69 524Q69 579 117 622T233 665Q268 665 277 664Q351 652 390 611T430 522Q430 470 396 421T302 350L299 348Q299 347 308 345T337 336T375 315Q457 262 457 175Q457 96 395 37T238 -22Q158 -22 100 21T42 130Q42 158 60 175T105 193Q133 193 151 175T169 130Q169 119 166 110T159 94T148 82T136 74T126 70T118 67L114 66Q165 21 238 21Q293 21 321 74Q338 107 338 175V195Q338 290 274 322Q259 328 213 329L171 330L168 332Q166 335 166 348Q166 366 174 366Q202 366 232 371Q266 376 294 413T322 525V533Q322 590 287 612Q265 626 240 626Q208 626 181 615T143 592T132 580H135Q138 579 143 578T153 573T165 566T175 555T183 540T186 520Q186 498 172 481T127 463Z"></path></g></g></g></g></g></svg></mjx-container></span> lack an octet for B .<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-18.jpg?height=141&width=394&top_left_y=1701&top_left_x=683" alt="" data-align="center" /></figure><br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-18.jpg?height=171&width=252&top_left_y=1701&top_left_x=1422" alt="" data-align="center" /></figure></li> <li>As can be seen above, <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.375ex;" width="4.067ex" height="1.92ex" role="img" focusable="false" viewbox="0 -683 1797.6 848.6"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="42" d="M131 622Q124 629 120 631T104 634T61 637H28V683H229H267H346Q423 683 459 678T531 651Q574 627 599 590T624 512Q624 461 583 419T476 360L466 357Q539 348 595 302T651 187Q651 119 600 67T469 3Q456 1 242 0H28V46H61Q103 47 112 49T131 61V622ZM511 513Q511 560 485 594T416 636Q415 636 403 636T371 636T333 637Q266 637 251 636T232 628Q229 624 229 499V374H312L396 375L406 377Q410 378 417 380T442 393T474 417T499 456T511 513ZM537 188Q537 239 509 282T430 336L329 337H229V200V116Q229 57 234 52Q240 47 334 47H383Q425 47 443 53Q486 67 511 104T537 188Z"></path><path data-c="46" d="M128 619Q121 626 117 628T101 631T58 634H25V680H582V676Q584 670 596 560T610 444V440H570V444Q563 493 561 501Q555 538 543 563T516 601T477 622T431 631T374 633H334H286Q252 633 244 631T233 621Q232 619 232 490V363H284Q287 363 303 363T327 364T349 367T372 373T389 385Q407 403 410 459V480H450V200H410V221Q407 276 389 296Q381 303 371 307T348 313T327 316T303 317T284 317H232V189L233 61Q240 54 245 52T270 48T333 46H360V0H348Q324 3 182 3Q51 3 36 0H25V46H58Q100 47 109 49T128 61V619Z" transform="translate(708,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1394,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="33" d="M127 463Q100 463 85 480T69 524Q69 579 117 622T233 665Q268 665 277 664Q351 652 390 611T430 522Q430 470 396 421T302 350L299 348Q299 347 308 345T337 336T375 315Q457 262 457 175Q457 96 395 37T238 -22Q158 -22 100 21T42 130Q42 158 60 175T105 193Q133 193 151 175T169 130Q169 119 166 110T159 94T148 82T136 74T126 70T118 67L114 66Q165 21 238 21Q293 21 321 74Q338 107 338 175V195Q338 290 274 322Q259 328 213 329L171 330L168 332Q166 335 166 348Q166 366 174 366Q202 366 232 371Q266 376 294 413T322 525V533Q322 590 287 612Q265 626 240 626Q208 626 181 615T143 592T132 580H135Q138 579 143 578T153 573T165 566T175 555T183 540T186 520Q186 498 172 481T127 463Z"></path></g></g></g></g></g></svg></mjx-container></span> molecule does not form a double bond between B and F due to the positive formal charge resulting on F (the more electronegative element). Boron, however, can complete an octet by reacting with another molecule (such as <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.375ex;" width="4.381ex" height="1.92ex" role="img" focusable="false" viewbox="0 -683 1936.6 848.6"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z"></path><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z" transform="translate(750,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1533,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="33" d="M127 463Q100 463 85 480T69 524Q69 579 117 622T233 665Q268 665 277 664Q351 652 390 611T430 522Q430 470 396 421T302 350L299 348Q299 347 308 345T337 336T375 315Q457 262 457 175Q457 96 395 37T238 -22Q158 -22 100 21T42 130Q42 158 60 175T105 193Q133 193 151 175T169 130Q169 119 166 110T159 94T148 82T136 74T126 70T118 67L114 66Q165 21 238 21Q293 21 321 74Q338 107 338 175V195Q338 290 274 322Q259 328 213 329L171 330L168 332Q166 335 166 348Q166 366 174 366Q202 366 232 371Q266 376 294 413T322 525V533Q322 590 287 612Q265 626 240 626Q208 626 181 615T143 592T132 580H135Q138 579 143 578T153 573T165 566T175 555T183 540T186 520Q186 498 172 481T127 463Z"></path></g></g></g></g></g></svg></mjx-container></span> ), as shown below:<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-18.jpg?height=231&width=839&top_left_y=2126&top_left_x=715" alt="" data-align="center" /></figure></li> </ul> <h2 type="section" data-unnumbered="true" id="exceptions-to-the-octed-rule-2" class="section-title"> EXCEPTIONS TO THE OCTED RULE</h2> <h2 type="section" data-unnumbered="true" id="expanded-octets%3A" class="section-title"> Expanded Octets:</h2> <ul> <li>Elements in the <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.05ex;" width="3.236ex" height="1.981ex" role="img" focusable="false" viewbox="0 -853.7 1430.1 875.7"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msup"><g data-mml-node="mn"><path data-c="33" d="M127 463Q100 463 85 480T69 524Q69 579 117 622T233 665Q268 665 277 664Q351 652 390 611T430 522Q430 470 396 421T302 350L299 348Q299 347 308 345T337 336T375 315Q457 262 457 175Q457 96 395 37T238 -22Q158 -22 100 21T42 130Q42 158 60 175T105 193Q133 193 151 175T169 130Q169 119 166 110T159 94T148 82T136 74T126 70T118 67L114 66Q165 21 238 21Q293 21 321 74Q338 107 338 175V195Q338 290 274 322Q259 328 213 329L171 330L168 332Q166 335 166 348Q166 366 174 366Q202 366 232 371Q266 376 294 413T322 525V533Q322 590 287 612Q265 626 240 626Q208 626 181 615T143 592T132 580H135Q138 579 143 578T153 573T165 566T175 555T183 540T186 520Q186 498 172 481T127 463Z"></path></g><g data-mml-node="TeXAtom" transform="translate(533,363) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mtext"><path data-c="72" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T98 122T98 161T98 203Q98 234 98 269T98 328L97 351Q94 370 83 376T38 385H20V408Q20 431 22 431L32 432Q42 433 60 434T96 436Q112 437 131 438T160 441T171 442H174V373Q213 441 271 441H277Q322 441 343 419T364 373Q364 352 351 337T313 322Q288 322 276 338T263 372Q263 381 265 388T270 400T273 405Q271 407 250 401Q234 393 226 386Q179 341 179 207V154Q179 141 179 127T179 101T180 81T180 66V61Q181 59 183 57T188 54T193 51T200 49T207 48T216 47T225 47T235 46T245 46H276V0H267Q249 3 140 3Q37 3 28 0H20V46H36Z"></path><path data-c="64" d="M376 495Q376 511 376 535T377 568Q377 613 367 624T316 637H298V660Q298 683 300 683L310 684Q320 685 339 686T376 688Q393 689 413 690T443 693T454 694H457V390Q457 84 458 81Q461 61 472 55T517 46H535V0Q533 0 459 -5T380 -11H373V44L365 37Q307 -11 235 -11Q158 -11 96 50T34 215Q34 315 97 378T244 442Q319 442 376 393V495ZM373 342Q328 405 260 405Q211 405 173 369Q146 341 139 305T131 211Q131 155 138 120T173 59Q203 26 251 26Q322 26 373 103V342Z" transform="translate(392,0)"></path><path data-c="A0" d="" transform="translate(948,0)"></path></g></g></g></g></g></svg></mjx-container></span> period of the periodic table and beyond often exhibit expanded octets of up to 12 (and occasionally 14) electrons. For examples, consider the Lewis structures for <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.375ex;" width="5.053ex" height="1.994ex" role="img" focusable="false" viewbox="0 -716 2233.6 881.6"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="41" d="M255 0Q240 3 140 3Q48 3 39 0H32V46H47Q119 49 139 88Q140 91 192 245T295 553T348 708Q351 716 366 716H376Q396 715 400 709Q402 707 508 390L617 67Q624 54 636 51T687 46H717V0H708Q699 3 581 3Q458 3 437 0H427V46H440Q510 46 510 64Q510 66 486 138L462 209H229L209 150Q189 91 189 85Q189 72 209 59T259 46H264V0H255ZM447 255L345 557L244 256Q244 255 345 255H447Z"></path><path data-c="73" d="M295 316Q295 356 268 385T190 414Q154 414 128 401Q98 382 98 349Q97 344 98 336T114 312T157 287Q175 282 201 278T245 269T277 256Q294 248 310 236T342 195T359 133Q359 71 321 31T198 -10H190Q138 -10 94 26L86 19L77 10Q71 4 65 -1L54 -11H46H42Q39 -11 33 -5V74V132Q33 153 35 157T45 162H54Q66 162 70 158T75 146T82 119T101 77Q136 26 198 26Q295 26 295 104Q295 133 277 151Q257 175 194 187T111 210Q75 227 54 256T33 318Q33 357 50 384T93 424T143 442T187 447H198Q238 447 268 432L283 424L292 431Q302 440 314 448H322H326Q329 448 335 442V310L329 304H301Q295 310 295 316Z" transform="translate(750,0)"></path><path data-c="46" d="M128 619Q121 626 117 628T101 631T58 634H25V680H582V676Q584 670 596 560T610 444V440H570V444Q563 493 561 501Q555 538 543 563T516 601T477 622T431 631T374 633H334H286Q252 633 244 631T233 621Q232 619 232 490V363H284Q287 363 303 363T327 364T349 367T372 373T389 385Q407 403 410 459V480H450V200H410V221Q407 276 389 296Q381 303 371 307T348 313T327 316T303 317T284 317H232V189L233 61Q240 54 245 52T270 48T333 46H360V0H348Q324 3 182 3Q51 3 36 0H25V46H58Q100 47 109 49T128 61V619Z" transform="translate(1144,0)"></path></g></g><g 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490V363H284Q287 363 303 363T327 364T349 367T372 373T389 385Q407 403 410 459V480H450V200H410V221Q407 276 389 296Q381 303 371 307T348 313T327 316T303 317T284 317H232V189L233 61Q240 54 245 52T270 48T333 46H360V0H348Q324 3 182 3Q51 3 36 0H25V46H58Q100 47 109 49T128 61V619Z" transform="translate(556,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1242,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="36" d="M42 313Q42 476 123 571T303 666Q372 666 402 630T432 550Q432 525 418 510T379 495Q356 495 341 509T326 548Q326 592 373 601Q351 623 311 626Q240 626 194 566Q147 500 147 364L148 360Q153 366 156 373Q197 433 263 433H267Q313 433 348 414Q372 400 396 374T435 317Q456 268 456 210V192Q456 169 451 149Q440 90 387 34T253 -22Q225 -22 199 -14T143 16T92 75T56 172T42 313ZM257 397Q227 397 205 380T171 335T154 278T148 216Q148 133 160 97T198 39Q222 21 251 21Q302 21 329 59Q342 77 347 104T352 209Q352 289 347 316T329 361Q302 397 257 397Z"></path></g></g></g></g></g></svg></mjx-container></span>, shown below:<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-19.jpg?height=256&width=244&top_left_y=640&top_left_x=949" alt="" data-align="center" /></figure><br /> <div class="smiles-inline" style="display: inline-block;"><svg id="smiles-mjrskud5jcem25r757r" viewbox="0 0 188 134.61302358507905" style="width: 188.1755873753941px; height: 134.61302358507905px; overflow: visible;"><defs><lineargradient id="line-mjrskud5jcem25r757r-1" gradientunits="userSpaceOnUse" x1="95.63755434861241" y1="28.049999999999997" x2="95.63756379031398" y2="70.12499999999893"><stop stop-color="currentColor" offset="20%"></stop><stop stop-color="currentColor" offset="100%"></stop></lineargradient><lineargradient id="line-mjrskud5jcem25r757r-3" gradientunits="userSpaceOnUse" x1="74.60007196706792" y1="106.56302358507905" x2="95.63756379031398" y2="70.12499999999893"><stop 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fill="currentColor" style="text-anchor: start; writing-mode: horizontal-tb; text-orientation: mixed; letter-spacing: normal; direction: ltr;"><tspan>S</tspan></text><text x="132.0755873753941" y="91.162491823245" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text><text x="66.21204020523386" y="56.10000817675288" class="element-mjrskud5jcem25r757r" fill="currentColor" style="text-anchor: start; writing-mode: horizontal-tb; text-orientation: mixed; letter-spacing: normal; direction: rtl; unicode-bidi: bidi-override;"><tspan>F</tspan></text><text x="59.19954020523386" y="49.087508176752884" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text><text x="66.21204020523386" y="56.10000817675288" class="element-mjrskud5jcem25r757r" fill="currentColor" style="text-anchor: start; writing-mode: horizontal-tb; text-orientation: mixed; letter-spacing: normal; direction: rtl; unicode-bidi: bidi-override;"><tspan>F</tspan></text><text x="59.19954020523386" y="49.087508176752884" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text><text x="66.21204020523386" y="56.10000817675288" class="element-mjrskud5jcem25r757r" fill="currentColor" style="text-anchor: start; writing-mode: horizontal-tb; text-orientation: mixed; letter-spacing: normal; direction: rtl; unicode-bidi: bidi-override;"><tspan>F</tspan></text><text x="59.19954020523386" y="49.087508176752884" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text><text x="66.21204020523386" y="56.10000817675288" class="element-mjrskud5jcem25r757r" fill="currentColor" style="text-anchor: start; writing-mode: horizontal-tb; text-orientation: mixed; letter-spacing: normal; direction: rtl; unicode-bidi: bidi-override;"><tspan>F</tspan></text><text x="59.19954020523386" y="49.087508176752884" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text><text x="66.21204020523386" y="56.10000817675288" class="element-mjrskud5jcem25r757r" fill="currentColor" style="text-anchor: start; writing-mode: horizontal-tb; text-orientation: mixed; letter-spacing: normal; direction: rtl; unicode-bidi: bidi-override;"><tspan>I<tspan baseline-shift="super" class="sub-mjrskud5jcem25r757r">-</tspan></tspan></text><text x="59.19954020523386" y="49.087508176752884" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text></g></svg></div></li> <li>Both As and S have expanded octets (10 and 12 electrons, respectively) and are stable. Elements in <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.05ex;" width="3.236ex" height="1.981ex" role="img" focusable="false" viewbox="0 -853.7 1430.1 875.7"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msup"><g data-mml-node="mn"><path data-c="33" d="M127 463Q100 463 85 480T69 524Q69 579 117 622T233 665Q268 665 277 664Q351 652 390 611T430 522Q430 470 396 421T302 350L299 348Q299 347 308 345T337 336T375 315Q457 262 457 175Q457 96 395 37T238 -22Q158 -22 100 21T42 130Q42 158 60 175T105 193Q133 193 151 175T169 130Q169 119 166 110T159 94T148 82T136 74T126 70T118 67L114 66Q165 21 238 21Q293 21 321 74Q338 107 338 175V195Q338 290 274 322Q259 328 213 329L171 330L168 332Q166 335 166 348Q166 366 174 366Q202 366 232 371Q266 376 294 413T322 525V533Q322 590 287 612Q265 626 240 626Q208 626 181 615T143 592T132 580H135Q138 579 143 578T153 573T165 566T175 555T183 540T186 520Q186 498 172 481T127 463Z"></path></g><g data-mml-node="TeXAtom" transform="translate(533,363) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mtext"><path data-c="72" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T98 122T98 161T98 203Q98 234 98 269T98 328L97 351Q94 370 83 376T38 385H20V408Q20 431 22 431L32 432Q42 433 60 434T96 436Q112 437 131 438T160 441T171 442H174V373Q213 441 271 441H277Q322 441 343 419T364 373Q364 352 351 337T313 322Q288 322 276 338T263 372Q263 381 265 388T270 400T273 405Q271 407 250 401Q234 393 226 386Q179 341 179 207V154Q179 141 179 127T179 101T180 81T180 66V61Q181 59 183 57T188 54T193 51T200 49T207 48T216 47T225 47T235 46T245 46H276V0H267Q249 3 140 3Q37 3 28 0H20V46H36Z"></path><path data-c="64" d="M376 495Q376 511 376 535T377 568Q377 613 367 624T316 637H298V660Q298 683 300 683L310 684Q320 685 339 686T376 688Q393 689 413 690T443 693T454 694H457V390Q457 84 458 81Q461 61 472 55T517 46H535V0Q533 0 459 -5T380 -11H373V44L365 37Q307 -11 235 -11Q158 -11 96 50T34 215Q34 315 97 378T244 442Q319 442 376 393V495ZM373 342Q328 405 260 405Q211 405 173 369Q146 341 139 305T131 211Q131 155 138 120T173 59Q203 26 251 26Q322 26 373 103V342Z" transform="translate(392,0)"></path><path data-c="A0" d="" transform="translate(948,0)"></path></g></g></g></g></g></svg></mjx-container></span> period and beyond have expanded octets because the d orbitals in these elements are energetically accessible to accommodate the extra electrons. By contrast, elements in the <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: 0;" width="3.498ex" height="1.932ex" role="img" focusable="false" viewbox="0 -853.7 1546.1 853.7"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msup"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g><g data-mml-node="TeXAtom" transform="translate(533,363) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mtext"><path data-c="6E" d="M41 46H55Q94 46 102 60V68Q102 77 102 91T102 122T103 161T103 203Q103 234 103 269T102 328V351Q99 370 88 376T43 385H25V408Q25 431 27 431L37 432Q47 433 65 434T102 436Q119 437 138 438T167 441T178 442H181V402Q181 364 182 364T187 369T199 384T218 402T247 421T285 437Q305 442 336 442Q450 438 463 329Q464 322 464 190V104Q464 66 466 59T477 49Q498 46 526 46H542V0H534L510 1Q487 2 460 2T422 3Q319 3 310 0H302V46H318Q379 46 379 62Q380 64 380 200Q379 335 378 343Q372 371 358 385T334 402T308 404Q263 404 229 370Q202 343 195 315T187 232V168V108Q187 78 188 68T191 55T200 49Q221 46 249 46H265V0H257L234 1Q210 2 183 2T145 3Q42 3 33 0H25V46H41Z"></path><path data-c="64" d="M376 495Q376 511 376 535T377 568Q377 613 367 624T316 637H298V660Q298 683 300 683L310 684Q320 685 339 686T376 688Q393 689 413 690T443 693T454 694H457V390Q457 84 458 81Q461 61 472 55T517 46H535V0Q533 0 459 -5T380 -11H373V44L365 37Q307 -11 235 -11Q158 -11 96 50T34 215Q34 315 97 378T244 442Q319 442 376 393V495ZM373 342Q328 405 260 405Q211 405 173 369Q146 341 139 305T131 211Q131 155 138 120T173 59Q203 26 251 26Q322 26 373 103V342Z" transform="translate(556,0)"></path><path data-c="A0" d="" transform="translate(1112,0)"></path></g></g></g></g></g></svg></mjx-container></span> period never form expanded octets.</li> <li>In some Lewis structures, an expanded octet might be favorable due to formal charges. For example, consider the Lewis structure for sulfuric acid shown below. 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"></text><text x="91.1625188833989" y="35.0625" class="element-mjrskud9r1ufzm2gg9s" fill="currentColor" style="text-anchor: start; writing-mode: horizontal-tb; text-orientation: mixed; letter-spacing: normal; direction: ltr;"><tspan>O<tspan baseline-shift="super" class="sub-mjrskud9r1ufzm2gg9s">-</tspan></tspan></text><text x="98.1750188833989" y="28.049999999999997" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text><text x="91.16248111659259" y="119.21249999999152" class="element-mjrskud9r1ufzm2gg9s" fill="currentColor" style="text-anchor: start; writing-mode: horizontal-tb; text-orientation: mixed; letter-spacing: normal; direction: ltr;"><tspan>O</tspan><tspan style="unicode-bidi: plaintext;">H</tspan></text><text x="98.17498111659259" y="112.19999999999152" class="debug" fill="#ff0000" style=" font: 5px Droid Sans, sans-serif; "></text></g></svg></div></li> <li>The formal charge on the atoms in the structure of <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="6.69ex" height="1.934ex" role="img" focusable="false" viewbox="0 -705 2957.1 855"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g><g data-mml-node="msub" transform="translate(1186.6,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="53" d="M55 507Q55 590 112 647T243 704H257Q342 704 405 641L426 672Q431 679 436 687T446 700L449 704Q450 704 453 704T459 705H463Q466 705 472 699V462L466 456H448Q437 456 435 459T430 479Q413 605 329 646Q292 662 254 662Q201 662 168 626T135 542Q135 508 152 480T200 435Q210 431 286 412T370 389Q427 367 463 314T500 191Q500 110 448 45T301 -21Q245 -21 201 -4T140 27L122 41Q118 36 107 21T87 -7T78 -21Q76 -22 68 -22H64Q61 -22 55 -16V101Q55 220 56 222Q58 227 76 227H89Q95 221 95 214Q95 182 105 151T139 90T205 42T305 24Q352 24 386 62T420 155Q420 198 398 233T340 281Q284 295 266 300Q261 301 239 306T206 314T174 325T141 343T112 367T85 402Q55 451 55 507Z"></path><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z" transform="translate(556,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1367,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="34" d="M462 0Q444 3 333 3Q217 3 199 0H190V46H221Q241 46 248 46T265 48T279 53T286 61Q287 63 287 115V165H28V211L179 442Q332 674 334 675Q336 677 355 677H373L379 671V211H471V165H379V114Q379 73 379 66T385 54Q393 47 442 46H471V0H462ZM293 211V545L74 212L183 211H293Z"></path></g></g></g></g></g></svg></mjx-container></span> can be reduced by expanding the octet on sulfur (also shown above). Experiments show that the bond length of the sulfur-oxygen bonds in the two oxygens without the hydrogens are shorter than expected for the single sulfur-oxygen bonds, indicating the expanded octet Lewis structure plays an important role in describing the bonding in <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="6.69ex" height="1.934ex" role="img" focusable="false" viewbox="0 -705 2957.1 855"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g><g data-mml-node="msub" transform="translate(1186.6,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="53" d="M55 507Q55 590 112 647T243 704H257Q342 704 405 641L426 672Q431 679 436 687T446 700L449 704Q450 704 453 704T459 705H463Q466 705 472 699V462L466 456H448Q437 456 435 459T430 479Q413 605 329 646Q292 662 254 662Q201 662 168 626T135 542Q135 508 152 480T200 435Q210 431 286 412T370 389Q427 367 463 314T500 191Q500 110 448 45T301 -21Q245 -21 201 -4T140 27L122 41Q118 36 107 21T87 -7T78 -21Q76 -22 68 -22H64Q61 -22 55 -16V101Q55 220 56 222Q58 227 76 227H89Q95 221 95 214Q95 182 105 151T139 90T205 42T305 24Q352 24 386 62T420 155Q420 198 398 233T340 281Q284 295 266 300Q261 301 239 306T206 314T174 325T141 343T112 367T85 402Q55 451 55 507Z"></path><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z" transform="translate(556,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1367,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="34" d="M462 0Q444 3 333 3Q217 3 199 0H190V46H221Q241 46 248 46T265 48T279 53T286 61Q287 63 287 115V165H28V211L179 442Q332 674 334 675Q336 677 355 677H373L379 671V211H471V165H379V114Q379 73 379 66T385 54Q393 47 442 46H471V0H462ZM293 211V545L74 212L183 211H293Z"></path></g></g></g></g></g></svg></mjx-container></span>.</li> </ul> <h2 type="section" data-unnumbered="true" id="exceptions-to-the-octed-rule-3" class="section-title"> EXCEPTIONS TO THE OCTED RULE</h2> <h2 type="section" data-unnumbered="true" id="examples%3A-7" class="section-title"> Examples:</h2> <ol> <li>Which molecule could have an expanded octet?<br /> a) <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.375ex;" width="9.328ex" height="1.97ex" role="img" focusable="false" viewbox="0 -705 4123.1 870.6"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mstyle"><g data-mml-node="mspace"></g></g><g data-mml-node="msub" transform="translate(1000,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g><g data-mml-node="msub" transform="translate(2186.6,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z" transform="translate(722,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1533,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="33" d="M127 463Q100 463 85 480T69 524Q69 579 117 622T233 665Q268 665 277 664Q351 652 390 611T430 522Q430 470 396 421T302 350L299 348Q299 347 308 345T337 336T375 315Q457 262 457 175Q457 96 395 37T238 -22Q158 -22 100 21T42 130Q42 158 60 175T105 193Q133 193 151 175T169 130Q169 119 166 110T159 94T148 82T136 74T126 70T118 67L114 66Q165 21 238 21Q293 21 321 74Q338 107 338 175V195Q338 290 274 322Q259 328 213 329L171 330L168 332Q166 335 166 348Q166 366 174 366Q202 366 232 371Q266 376 294 413T322 525V533Q322 590 287 612Q265 626 240 626Q208 626 181 615T143 592T132 580H135Q138 579 143 578T153 573T165 566T175 555T183 540T186 520Q186 498 172 481T127 463Z"></path></g></g></g></g></g></svg></mjx-container></span><br /> b) <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.375ex;" width="6.973ex" height="1.97ex" role="img" focusable="false" viewbox="0 -705 3082.1 870.6"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="33" d="M127 463Q100 463 85 480T69 524Q69 579 117 622T233 665Q268 665 277 664Q351 652 390 611T430 522Q430 470 396 421T302 350L299 348Q299 347 308 345T337 336T375 315Q457 262 457 175Q457 96 395 37T238 -22Q158 -22 100 21T42 130Q42 158 60 175T105 193Q133 193 151 175T169 130Q169 119 166 110T159 94T148 82T136 74T126 70T118 67L114 66Q165 21 238 21Q293 21 321 74Q338 107 338 175V195Q338 290 274 322Q259 328 213 329L171 330L168 332Q166 335 166 348Q166 366 174 366Q202 366 232 371Q266 376 294 413T322 525V533Q322 590 287 612Q265 626 240 626Q208 626 181 615T143 592T132 580H135Q138 579 143 578T153 573T165 566T175 555T183 540T186 520Q186 498 172 481T127 463Z"></path></g></g></g><g data-mml-node="msub" transform="translate(1186.6,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="50" d="M130 622Q123 629 119 631T103 634T60 637H27V683H214Q237 683 276 683T331 684Q419 684 471 671T567 616Q624 563 624 489Q624 421 573 372T451 307Q429 302 328 301H234V181Q234 62 237 58Q245 47 304 46H337V0H326Q305 3 182 3Q47 3 38 0H27V46H60Q102 47 111 49T130 61V622ZM507 488Q507 514 506 528T500 564T483 597T450 620T397 635Q385 637 307 637H286Q237 637 234 628Q231 624 231 483V342H302H339Q390 342 423 349T481 382Q507 411 507 488Z"></path><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z" transform="translate(681,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1492,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="34" d="M462 0Q444 3 333 3Q217 3 199 0H190V46H221Q241 46 248 46T265 48T279 53T286 61Q287 63 287 115V165H28V211L179 442Q332 674 334 675Q336 677 355 677H373L379 671V211H471V165H379V114Q379 73 379 66T385 54Q393 47 442 46H471V0H462ZM293 211V545L74 212L183 211H293Z"></path></g></g></g></g></g></svg></mjx-container></span><br /> c) <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="6.142ex" height="1.934ex" role="img" focusable="false" viewbox="0 -705 2714.6 855"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z" transform="translate(750,0)"></path><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z" transform="translate(1500,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(2311,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g></g></g></svg></mjx-container></span></li> <li>Write Lewis strtucture for <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="5.166ex" height="1.885ex" role="img" focusable="false" viewbox="0 -683 2283.6 833"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="58" d="M270 0Q252 3 141 3Q46 3 31 0H23V46H40Q129 50 161 88Q165 94 244 216T324 339Q324 341 235 480T143 622Q133 631 119 634T57 637H37V683H46Q64 680 172 680Q297 680 318 683H329V637H324Q307 637 286 632T263 621Q263 618 322 525T384 431Q385 431 437 511T489 593Q490 595 490 599Q490 611 477 622T436 637H428V683H437Q455 680 566 680Q661 680 676 683H684V637H667Q585 634 551 599Q548 596 478 491Q412 388 412 387Q412 385 514 225T620 62Q628 53 642 50T695 46H726V0H717Q699 3 591 3Q466 3 445 0H434V46H440Q454 46 476 51T499 64Q499 67 463 124T390 238L353 295L350 292Q348 290 343 283T331 265T312 236T286 195Q219 88 218 84Q218 70 234 59T272 46H280V0H270Z"></path><path data-c="65" d="M28 218Q28 273 48 318T98 391T163 433T229 448Q282 448 320 430T378 380T406 316T415 245Q415 238 408 231H126V216Q126 68 226 36Q246 30 270 30Q312 30 342 62Q359 79 369 104L379 128Q382 131 395 131H398Q415 131 415 121Q415 117 412 108Q393 53 349 21T250 -11Q155 -11 92 58T28 218ZM333 275Q322 403 238 411H236Q228 411 220 410T195 402T166 381T143 340T127 274V267H333V275Z" transform="translate(750,0)"></path><path data-c="46" d="M128 619Q121 626 117 628T101 631T58 634H25V680H582V676Q584 670 596 560T610 444V440H570V444Q563 493 561 501Q555 538 543 563T516 601T477 622T431 631T374 633H334H286Q252 633 244 631T233 621Q232 619 232 490V363H284Q287 363 303 363T327 364T349 367T372 373T389 385Q407 403 410 459V480H450V200H410V221Q407 276 389 296Q381 303 371 307T348 313T327 316T303 317T284 317H232V189L233 61Q240 54 245 52T270 48T333 46H360V0H348Q324 3 182 3Q51 3 36 0H25V46H58Q100 47 109 49T128 61V619Z" transform="translate(1194,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1880,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g></g></g></svg></mjx-container></span>.</li> <li>Write Lewis structure for each molecule shown below:<br /> a) <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="7.273ex" height="1.934ex" role="img" focusable="false" viewbox="0 -705 3214.6 855"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mstyle"><g data-mml-node="mspace"></g></g><g data-mml-node="msub" transform="translate(1000,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(722,0)"></path><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z" transform="translate(1000,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1811,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g></g></g></svg></mjx-container></span><br /> b) <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="5.856ex" height="1.934ex" role="img" focusable="false" viewbox="0 -705 2588.6 855"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="42" d="M131 622Q124 629 120 631T104 634T61 637H28V683H229H267H346Q423 683 459 678T531 651Q574 627 599 590T624 512Q624 461 583 419T476 360L466 357Q539 348 595 302T651 187Q651 119 600 67T469 3Q456 1 242 0H28V46H61Q103 47 112 49T131 61V622ZM511 513Q511 560 485 594T416 636Q415 636 403 636T371 636T333 637Q266 637 251 636T232 628Q229 624 229 499V374H312L396 375L406 377Q410 378 417 380T442 393T474 417T499 456T511 513ZM537 188Q537 239 509 282T430 336L329 337H229V200V116Q229 57 234 52Q240 47 334 47H383Q425 47 443 53Q486 67 511 104T537 188Z"></path><path data-c="65" d="M28 218Q28 273 48 318T98 391T163 433T229 448Q282 448 320 430T378 380T406 316T415 245Q415 238 408 231H126V216Q126 68 226 36Q246 30 270 30Q312 30 342 62Q359 79 369 104L379 128Q382 131 395 131H398Q415 131 415 121Q415 117 412 108Q393 53 349 21T250 -11Q155 -11 92 58T28 218ZM333 275Q322 403 238 411H236Q228 411 220 410T195 402T166 381T143 340T127 274V267H333V275Z" transform="translate(708,0)"></path><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z" transform="translate(1152,0)"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(1874,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(2185,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g></g></g></svg></mjx-container></span></li> </ol> <h2 type="section" data-unnumbered="true" id="bond-energy" class="section-title"> BOND ENERGY</h2> <ul> <li>The bond energy of a chemical bond is the energy required to break 1 mol of the bond in the gas phase. For example, the bond energy of the <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="7.291ex" height="1.781ex" role="img" focusable="false" viewbox="0 -705 3222.4 787"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(722,0)"></path></g></g><g data-mml-node="mo" transform="translate(1222.2,0)"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2222.4,0)"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(722,0)"></path></g></g></g></g></svg></mjx-container></span> bond in <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="3.25ex" height="1.934ex" role="img" focusable="false" viewbox="0 -705 1436.6 855"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(722,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1033,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g></g></g></svg></mjx-container></span> is <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.566ex;" width="11.093ex" height="2.262ex" role="img" focusable="false" viewbox="0 -750 4903 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path><path data-c="34" d="M462 0Q444 3 333 3Q217 3 199 0H190V46H221Q241 46 248 46T265 48T279 53T286 61Q287 63 287 115V165H28V211L179 442Q332 674 334 675Q336 677 355 677H373L379 671V211H471V165H379V114Q379 73 379 66T385 54Q393 47 442 46H471V0H462ZM293 211V545L74 212L183 211H293Z" transform="translate(500,0)"></path><path data-c="33" d="M127 463Q100 463 85 480T69 524Q69 579 117 622T233 665Q268 665 277 664Q351 652 390 611T430 522Q430 470 396 421T302 350L299 348Q299 347 308 345T337 336T375 315Q457 262 457 175Q457 96 395 37T238 -22Q158 -22 100 21T42 130Q42 158 60 175T105 193Q133 193 151 175T169 130Q169 119 166 110T159 94T148 82T136 74T126 70T118 67L114 66Q165 21 238 21Q293 21 321 74Q338 107 338 175V195Q338 290 274 322Q259 328 213 329L171 330L168 332Q166 335 166 348Q166 366 174 366Q202 366 232 371Q266 376 294 413T322 525V533Q322 590 287 612Q265 626 240 626Q208 626 181 615T143 592T132 580H135Q138 579 143 578T153 573T165 566T175 555T183 540T186 520Q186 498 172 481T127 463Z" transform="translate(1000,0)"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1500,0)"><g data-mml-node="mtext"><path data-c="A0" d=""></path></g><g data-mml-node="mi" transform="translate(250,0)"><path data-c="6B" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T97 124T98 167T98 217T98 272T98 329Q98 366 98 407T98 482T98 542T97 586T97 603Q94 622 83 628T38 637H20V660Q20 683 22 683L32 684Q42 685 61 686T98 688Q115 689 135 690T165 693T176 694H179V463L180 233L240 287Q300 341 304 347Q310 356 310 364Q310 383 289 385H284V431H293Q308 428 412 428Q475 428 484 431H489V385H476Q407 380 360 341Q286 278 286 274Q286 273 349 181T420 79Q434 60 451 53T500 46H511V0H505Q496 3 418 3Q322 3 307 0H299V46H306Q330 48 330 65Q330 72 326 79Q323 84 276 153T228 222L176 176V120V84Q176 65 178 59T189 49Q210 46 238 46H254V0H246Q231 3 137 3T28 0H20V46H36Z"></path><path data-c="4A" d="M89 177Q115 177 133 160T152 112Q152 88 137 72T102 52Q99 51 101 49Q106 43 129 29Q159 15 190 15Q232 15 256 48T286 126Q286 127 286 142T286 183T286 238T287 306T287 378Q287 403 287 429T287 479T287 524T286 563T286 593T286 614V621Q281 630 263 633T182 637H154V683H166Q187 680 332 680Q439 680 457 683H465V637H449Q422 637 401 634Q393 631 389 623Q388 621 388 376T387 123Q377 61 322 20T194 -22Q188 -22 177 -21T160 -20Q96 -9 61 29T25 110Q25 144 44 160T89 177Z" transform="translate(528,0)"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2792,0)"><g data-mml-node="mo"><path data-c="2F" d="M423 750Q432 750 438 744T444 730Q444 725 271 248T92 -240Q85 -250 75 -250Q68 -250 62 -245T56 -231Q56 -221 230 257T407 740Q411 750 423 750Z"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(3292,0)"><g data-mml-node="mi"><path data-c="6D" d="M41 46H55Q94 46 102 60V68Q102 77 102 91T102 122T103 161T103 203Q103 234 103 269T102 328V351Q99 370 88 376T43 385H25V408Q25 431 27 431L37 432Q47 433 65 434T102 436Q119 437 138 438T167 441T178 442H181V402Q181 364 182 364T187 369T199 384T218 402T247 421T285 437Q305 442 336 442Q351 442 364 440T387 434T406 426T421 417T432 406T441 395T448 384T452 374T455 366L457 361L460 365Q463 369 466 373T475 384T488 397T503 410T523 422T546 432T572 439T603 442Q729 442 740 329Q741 322 741 190V104Q741 66 743 59T754 49Q775 46 803 46H819V0H811L788 1Q764 2 737 2T699 3Q596 3 587 0H579V46H595Q656 46 656 62Q657 64 657 200Q656 335 655 343Q649 371 635 385T611 402T585 404Q540 404 506 370Q479 343 472 315T464 232V168V108Q464 78 465 68T468 55T477 49Q498 46 526 46H542V0H534L510 1Q487 2 460 2T422 3Q319 3 310 0H302V46H318Q379 46 379 62Q380 64 380 200Q379 335 378 343Q372 371 358 385T334 402T308 404Q263 404 229 370Q202 343 195 315T187 232V168V108Q187 78 188 68T191 55T200 49Q221 46 249 46H265V0H257L234 1Q210 2 183 2T145 3Q42 3 33 0H25V46H41Z"></path><path data-c="6F" d="M28 214Q28 309 93 378T250 448Q340 448 405 380T471 215Q471 120 407 55T250 -10Q153 -10 91 57T28 214ZM250 30Q372 30 372 193V225V250Q372 272 371 288T364 326T348 362T317 390T268 410Q263 411 252 411Q222 411 195 399Q152 377 139 338T126 246V226Q126 130 145 91Q177 30 250 30Z" transform="translate(833,0)"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(1333,0)"></path></g></g></g></g></svg></mjx-container></span>, and bond energy of HCl is <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.566ex;" width="11.093ex" height="2.262ex" role="img" focusable="false" viewbox="0 -750 4903 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mn"><path data-c="34" d="M462 0Q444 3 333 3Q217 3 199 0H190V46H221Q241 46 248 46T265 48T279 53T286 61Q287 63 287 115V165H28V211L179 442Q332 674 334 675Q336 677 355 677H373L379 671V211H471V165H379V114Q379 73 379 66T385 54Q393 47 442 46H471V0H462ZM293 211V545L74 212L183 211H293Z"></path><path data-c="33" d="M127 463Q100 463 85 480T69 524Q69 579 117 622T233 665Q268 665 277 664Q351 652 390 611T430 522Q430 470 396 421T302 350L299 348Q299 347 308 345T337 336T375 315Q457 262 457 175Q457 96 395 37T238 -22Q158 -22 100 21T42 130Q42 158 60 175T105 193Q133 193 151 175T169 130Q169 119 166 110T159 94T148 82T136 74T126 70T118 67L114 66Q165 21 238 21Q293 21 321 74Q338 107 338 175V195Q338 290 274 322Q259 328 213 329L171 330L168 332Q166 335 166 348Q166 366 174 366Q202 366 232 371Q266 376 294 413T322 525V533Q322 590 287 612Q265 626 240 626Q208 626 181 615T143 592T132 580H135Q138 579 143 578T153 573T165 566T175 555T183 540T186 520Q186 498 172 481T127 463Z" transform="translate(500,0)"></path><path data-c="31" d="M213 578L200 573Q186 568 160 563T102 556H83V602H102Q149 604 189 617T245 641T273 663Q275 666 285 666Q294 666 302 660V361L303 61Q310 54 315 52T339 48T401 46H427V0H416Q395 3 257 3Q121 3 100 0H88V46H114Q136 46 152 46T177 47T193 50T201 52T207 57T213 61V578Z" transform="translate(1000,0)"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1500,0)"><g data-mml-node="mtext"><path data-c="A0" d=""></path></g><g data-mml-node="mi" transform="translate(250,0)"><path data-c="6B" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T97 124T98 167T98 217T98 272T98 329Q98 366 98 407T98 482T98 542T97 586T97 603Q94 622 83 628T38 637H20V660Q20 683 22 683L32 684Q42 685 61 686T98 688Q115 689 135 690T165 693T176 694H179V463L180 233L240 287Q300 341 304 347Q310 356 310 364Q310 383 289 385H284V431H293Q308 428 412 428Q475 428 484 431H489V385H476Q407 380 360 341Q286 278 286 274Q286 273 349 181T420 79Q434 60 451 53T500 46H511V0H505Q496 3 418 3Q322 3 307 0H299V46H306Q330 48 330 65Q330 72 326 79Q323 84 276 153T228 222L176 176V120V84Q176 65 178 59T189 49Q210 46 238 46H254V0H246Q231 3 137 3T28 0H20V46H36Z"></path><path data-c="4A" d="M89 177Q115 177 133 160T152 112Q152 88 137 72T102 52Q99 51 101 49Q106 43 129 29Q159 15 190 15Q232 15 256 48T286 126Q286 127 286 142T286 183T286 238T287 306T287 378Q287 403 287 429T287 479T287 524T286 563T286 593T286 614V621Q281 630 263 633T182 637H154V683H166Q187 680 332 680Q439 680 457 683H465V637H449Q422 637 401 634Q393 631 389 623Q388 621 388 376T387 123Q377 61 322 20T194 -22Q188 -22 177 -21T160 -20Q96 -9 61 29T25 110Q25 144 44 160T89 177Z" transform="translate(528,0)"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2792,0)"><g data-mml-node="mo"><path data-c="2F" d="M423 750Q432 750 438 744T444 730Q444 725 271 248T92 -240Q85 -250 75 -250Q68 -250 62 -245T56 -231Q56 -221 230 257T407 740Q411 750 423 750Z"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(3292,0)"><g data-mml-node="mi"><path data-c="6D" d="M41 46H55Q94 46 102 60V68Q102 77 102 91T102 122T103 161T103 203Q103 234 103 269T102 328V351Q99 370 88 376T43 385H25V408Q25 431 27 431L37 432Q47 433 65 434T102 436Q119 437 138 438T167 441T178 442H181V402Q181 364 182 364T187 369T199 384T218 402T247 421T285 437Q305 442 336 442Q351 442 364 440T387 434T406 426T421 417T432 406T441 395T448 384T452 374T455 366L457 361L460 365Q463 369 466 373T475 384T488 397T503 410T523 422T546 432T572 439T603 442Q729 442 740 329Q741 322 741 190V104Q741 66 743 59T754 49Q775 46 803 46H819V0H811L788 1Q764 2 737 2T699 3Q596 3 587 0H579V46H595Q656 46 656 62Q657 64 657 200Q656 335 655 343Q649 371 635 385T611 402T585 404Q540 404 506 370Q479 343 472 315T464 232V168V108Q464 78 465 68T468 55T477 49Q498 46 526 46H542V0H534L510 1Q487 2 460 2T422 3Q319 3 310 0H302V46H318Q379 46 379 62Q380 64 380 200Q379 335 378 343Q372 371 358 385T334 402T308 404Q263 404 229 370Q202 343 195 315T187 232V168V108Q187 78 188 68T191 55T200 49Q221 46 249 46H265V0H257L234 1Q210 2 183 2T145 3Q42 3 33 0H25V46H41Z"></path><path data-c="6F" d="M28 214Q28 309 93 378T250 448Q340 448 405 380T471 215Q471 120 407 55T250 -10Q153 -10 91 57T28 214ZM250 30Q372 30 372 193V225V250Q372 272 371 288T364 326T348 362T317 390T268 410Q263 411 252 411Q222 411 195 399Q152 377 139 338T126 246V226Q126 130 145 91Q177 30 250 30Z" transform="translate(833,0)"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(1333,0)"></path></g></g></g></g></svg></mjx-container></span>.</li> </ul> <div><span class="math-block "> 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637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="mo" transform="translate(1860.8,0)"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347Q722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153Q722 140 707 133H70Q56 140 56 153Z"></path></g><g data-mml-node="mn" transform="translate(2916.6,0)"><path data-c="34" d="M462 0Q444 3 333 3Q217 3 199 0H190V46H221Q241 46 248 46T265 48T279 53T286 61Q287 63 287 115V165H28V211L179 442Q332 674 334 675Q336 677 355 677H373L379 671V211H471V165H379V114Q379 73 379 66T385 54Q393 47 442 46H471V0H462ZM293 211V545L74 212L183 211H293Z"></path><path data-c="33" d="M127 463Q100 463 85 480T69 524Q69 579 117 622T233 665Q268 665 277 664Q351 652 390 611T430 522Q430 470 396 421T302 350L299 348Q299 347 308 345T337 336T375 315Q457 262 457 175Q457 96 395 37T238 -22Q158 -22 100 21T42 130Q42 158 60 175T105 193Q133 193 151 175T169 130Q169 119 166 110T159 94T148 82T136 74T126 70T118 67L114 66Q165 21 238 21Q293 21 321 74Q338 107 338 175V195Q338 290 274 322Q259 328 213 329L171 330L168 332Q166 335 166 348Q166 366 174 366Q202 366 232 371Q266 376 294 413T322 525V533Q322 590 287 612Q265 626 240 626Q208 626 181 615T143 592T132 580H135Q138 579 143 578T153 573T165 566T175 555T183 540T186 520Q186 498 172 481T127 463Z" transform="translate(500,0)"></path><path data-c="31" d="M213 578L200 573Q186 568 160 563T102 556H83V602H102Q149 604 189 617T245 641T273 663Q275 666 285 666Q294 666 302 660V361L303 61Q310 54 315 52T339 48T401 46H427V0H416Q395 3 257 3Q121 3 100 0H88V46H114Q136 46 152 46T177 47T193 50T201 52T207 57T213 61V578Z" transform="translate(1000,0)"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(4416.6,0)"><g data-mml-node="mtext"><path data-c="A0" d=""></path></g><g data-mml-node="mi" transform="translate(250,0)"><path data-c="6B" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T97 124T98 167T98 217T98 272T98 329Q98 366 98 407T98 482T98 542T97 586T97 603Q94 622 83 628T38 637H20V660Q20 683 22 683L32 684Q42 685 61 686T98 688Q115 689 135 690T165 693T176 694H179V463L180 233L240 287Q300 341 304 347Q310 356 310 364Q310 383 289 385H284V431H293Q308 428 412 428Q475 428 484 431H489V385H476Q407 380 360 341Q286 278 286 274Q286 273 349 181T420 79Q434 60 451 53T500 46H511V0H505Q496 3 418 3Q322 3 307 0H299V46H306Q330 48 330 65Q330 72 326 79Q323 84 276 153T228 222L176 176V120V84Q176 65 178 59T189 49Q210 46 238 46H254V0H246Q231 3 137 3T28 0H20V46H36Z"></path><path data-c="4A" d="M89 177Q115 177 133 160T152 112Q152 88 137 72T102 52Q99 51 101 49Q106 43 129 29Q159 15 190 15Q232 15 256 48T286 126Q286 127 286 142T286 183T286 238T287 306T287 378Q287 403 287 429T287 479T287 524T286 563T286 593T286 614V621Q281 630 263 633T182 637H154V683H166Q187 680 332 680Q439 680 457 683H465V637H449Q422 637 401 634Q393 631 389 623Q388 621 388 376T387 123Q377 61 322 20T194 -22Q188 -22 177 -21T160 -20Q96 -9 61 29T25 110Q25 144 44 160T89 177Z" transform="translate(528,0)"></path></g></g></g></g></g></g></g></svg></mjx-container></span></div> <ul> <li>Bond energy is always positive, because it always takes energy to break a bond. HCl is said to be a stronger bond than <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="3.25ex" height="1.934ex" role="img" focusable="false" viewbox="0 -705 1436.6 855"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(722,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1033,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g></g></g></svg></mjx-container></span>, because it requires more energy to break it. In general, compounds with stronger bond tend to be more stable and less reactive than compounds with weaker bonds.</li> <li>The triple bond of <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="2.685ex" height="1.885ex" role="img" focusable="false" viewbox="0 -683 1186.6 833"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g></g></g></svg></mjx-container></span> has a bond energy of <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.566ex;" width="11.093ex" height="2.262ex" role="img" focusable="false" viewbox="0 -750 4903 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mn"><path data-c="39" d="M352 287Q304 211 232 211Q154 211 104 270T44 396Q42 412 42 436V444Q42 537 111 606Q171 666 243 666Q245 666 249 666T257 665H261Q273 665 286 663T323 651T370 619T413 560Q456 472 456 334Q456 194 396 97Q361 41 312 10T208 -22Q147 -22 108 7T68 93T121 149Q143 149 158 135T173 96Q173 78 164 65T148 49T135 44L131 43Q131 41 138 37T164 27T206 22H212Q272 22 313 86Q352 142 352 280V287ZM244 248Q292 248 321 297T351 430Q351 508 343 542Q341 552 337 562T323 588T293 615T246 625Q208 625 181 598Q160 576 154 546T147 441Q147 358 152 329T172 282Q197 248 244 248Z"></path><path data-c="34" d="M462 0Q444 3 333 3Q217 3 199 0H190V46H221Q241 46 248 46T265 48T279 53T286 61Q287 63 287 115V165H28V211L179 442Q332 674 334 675Q336 677 355 677H373L379 671V211H471V165H379V114Q379 73 379 66T385 54Q393 47 442 46H471V0H462ZM293 211V545L74 212L183 211H293Z" transform="translate(500,0)"></path><path data-c="36" d="M42 313Q42 476 123 571T303 666Q372 666 402 630T432 550Q432 525 418 510T379 495Q356 495 341 509T326 548Q326 592 373 601Q351 623 311 626Q240 626 194 566Q147 500 147 364L148 360Q153 366 156 373Q197 433 263 433H267Q313 433 348 414Q372 400 396 374T435 317Q456 268 456 210V192Q456 169 451 149Q440 90 387 34T253 -22Q225 -22 199 -14T143 16T92 75T56 172T42 313ZM257 397Q227 397 205 380T171 335T154 278T148 216Q148 133 160 97T198 39Q222 21 251 21Q302 21 329 59Q342 77 347 104T352 209Q352 289 347 316T329 361Q302 397 257 397Z" transform="translate(1000,0)"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1500,0)"><g data-mml-node="mtext"><path data-c="A0" d=""></path></g><g data-mml-node="mi" transform="translate(250,0)"><path data-c="6B" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T97 124T98 167T98 217T98 272T98 329Q98 366 98 407T98 482T98 542T97 586T97 603Q94 622 83 628T38 637H20V660Q20 683 22 683L32 684Q42 685 61 686T98 688Q115 689 135 690T165 693T176 694H179V463L180 233L240 287Q300 341 304 347Q310 356 310 364Q310 383 289 385H284V431H293Q308 428 412 428Q475 428 484 431H489V385H476Q407 380 360 341Q286 278 286 274Q286 273 349 181T420 79Q434 60 451 53T500 46H511V0H505Q496 3 418 3Q322 3 307 0H299V46H306Q330 48 330 65Q330 72 326 79Q323 84 276 153T228 222L176 176V120V84Q176 65 178 59T189 49Q210 46 238 46H254V0H246Q231 3 137 3T28 0H20V46H36Z"></path><path data-c="4A" d="M89 177Q115 177 133 160T152 112Q152 88 137 72T102 52Q99 51 101 49Q106 43 129 29Q159 15 190 15Q232 15 256 48T286 126Q286 127 286 142T286 183T286 238T287 306T287 378Q287 403 287 429T287 479T287 524T286 563T286 593T286 614V621Q281 630 263 633T182 637H154V683H166Q187 680 332 680Q439 680 457 683H465V637H449Q422 637 401 634Q393 631 389 623Q388 621 388 376T387 123Q377 61 322 20T194 -22Q188 -22 177 -21T160 -20Q96 -9 61 29T25 110Q25 144 44 160T89 177Z" transform="translate(528,0)"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2792,0)"><g data-mml-node="mo"><path data-c="2F" d="M423 750Q432 750 438 744T444 730Q444 725 271 248T92 -240Q85 -250 75 -250Q68 -250 62 -245T56 -231Q56 -221 230 257T407 740Q411 750 423 750Z"></path></g></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(3292,0)"><g data-mml-node="mi"><path data-c="6D" d="M41 46H55Q94 46 102 60V68Q102 77 102 91T102 122T103 161T103 203Q103 234 103 269T102 328V351Q99 370 88 376T43 385H25V408Q25 431 27 431L37 432Q47 433 65 434T102 436Q119 437 138 438T167 441T178 442H181V402Q181 364 182 364T187 369T199 384T218 402T247 421T285 437Q305 442 336 442Q351 442 364 440T387 434T406 426T421 417T432 406T441 395T448 384T452 374T455 366L457 361L460 365Q463 369 466 373T475 384T488 397T503 410T523 422T546 432T572 439T603 442Q729 442 740 329Q741 322 741 190V104Q741 66 743 59T754 49Q775 46 803 46H819V0H811L788 1Q764 2 737 2T699 3Q596 3 587 0H579V46H595Q656 46 656 62Q657 64 657 200Q656 335 655 343Q649 371 635 385T611 402T585 404Q540 404 506 370Q479 343 472 315T464 232V168V108Q464 78 465 68T468 55T477 49Q498 46 526 46H542V0H534L510 1Q487 2 460 2T422 3Q319 3 310 0H302V46H318Q379 46 379 62Q380 64 380 200Q379 335 378 343Q372 371 358 385T334 402T308 404Q263 404 229 370Q202 343 195 315T187 232V168V108Q187 78 188 68T191 55T200 49Q221 46 249 46H265V0H257L234 1Q210 2 183 2T145 3Q42 3 33 0H25V46H41Z"></path><path data-c="6F" d="M28 214Q28 309 93 378T250 448Q340 448 405 380T471 215Q471 120 407 55T250 -10Q153 -10 91 57T28 214ZM250 30Q372 30 372 193V225V250Q372 272 371 288T364 326T348 362T317 390T268 410Q263 411 252 411Q222 411 195 399Q152 377 139 338T126 246V226Q126 130 145 91Q177 30 250 30Z" transform="translate(833,0)"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(1333,0)"></path></g></g></g></g></svg></mjx-container></span>, which indicates that it is a very strong and stable bond. As a result, nitrogen is relatively inert.</li> </ul> <div><span class="math-block "> <mjx-container class="MathJax" jax="SVG" display="true"><svg style="vertical-align: -0.566ex;" width="31.689ex" height="2.262ex" role="img" focusable="false" viewbox="0 -750 14006.7 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 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For example, consider the <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="6.096ex" height="1.781ex" role="img" focusable="false" viewbox="0 -705 2694.4 787"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path></g></g><g data-mml-node="mo" transform="translate(944.2,0)"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 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176V120V84Q176 65 178 59T189 49Q210 46 238 46H254V0H246Q231 3 137 3T28 0H20V46H36Z"></path><path data-c="4A" d="M89 177Q115 177 133 160T152 112Q152 88 137 72T102 52Q99 51 101 49Q106 43 129 29Q159 15 190 15Q232 15 256 48T286 126Q286 127 286 142T286 183T286 238T287 306T287 378Q287 403 287 429T287 479T287 524T286 563T286 593T286 614V621Q281 630 263 633T182 637H154V683H166Q187 680 332 680Q439 680 457 683H465V637H449Q422 637 401 634Q393 631 389 623Q388 621 388 376T387 123Q377 61 322 20T194 -22Q188 -22 177 -21T160 -20Q96 -9 61 29T25 110Q25 144 44 160T89 177Z" transform="translate(528,0)"></path></g></g></g></g></g></g></g></svg></mjx-container></span></div> <ul> <li>An average bond energy can be calculated for a chemical bond based on the average of bond energy values for that bond in a large number of compounds. Listed to the right is the average bond energy for a number of common chemical bonds.</li> <li>Note that in general, for a given pair of atoms, triple bonds are stronger than double bonds, which are in turn, stronger than single bonds.</li> </ul> <div class="table" number="1"> <div class="table_tabular" style="text-align: center"> <div class="inline-tabular"><table class="tabular"> <tbody> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">Bond</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">Bond Energy (kJ/mol)</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="6.159ex" height="1.731ex" role="img" focusable="false" viewbox="0 -683 2722.4 765"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="mo" transform="translate(972.2,0)"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1972.4,0)"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g></g></g></svg></mjx-container></span></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">436</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="6.096ex" height="1.781ex" role="img" focusable="false" viewbox="0 -705 2694.4 787"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="mo" transform="translate(972.2,0)"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1972.4,0)"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path></g></g></g></g></svg></mjx-container></span></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">414</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="6.159ex" height="1.731ex" role="img" focusable="false" viewbox="0 -683 2722.4 765"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 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style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="6.223ex" height="1.781ex" role="img" focusable="false" viewbox="0 -705 2750.4 787"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 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!important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">464</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="5.72ex" height="1.781ex" role="img" focusable="false" viewbox="0 -705 2528.4 787"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 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height="1.645ex" role="img" focusable="false" viewbox="0 -705 2555.6 727"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path></g></g><g data-mml-node="mo" transform="translate(999.8,0)"><path data-c="2261" d="M56 444Q56 457 70 464H707Q722 456 722 444Q722 430 706 424H72Q56 429 56 444ZM56 237T56 250T70 270H707Q722 262 722 250T707 230H70Q56 237 56 250ZM56 56Q56 71 72 76H706Q722 70 722 56Q722 44 707 36H70Q56 43 56 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border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">C-Cl</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">339</td> </tr> </tbody> </table> </div></div> <div class="caption_table">* 799 in <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="4.381ex" height="1.934ex" role="img" focusable="false" viewbox="0 -705 1936.6 855"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z" transform="translate(722,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1533,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g></g></g></svg></mjx-container></span>.</div></div> <h2 type="section" data-unnumbered="true" id="using-bond-energies-to-estimate-%5C(%5Cboldsymbol%7B%5Cdelta%7D-%5Cmathbf%7Bh%7D_%7B%5Cmathbf%7Br-x-n%7D%7D%5C)" class="section-title"> USING BOND ENERGIES TO ESTIMATE <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="7.143ex" height="1.919ex" role="img" focusable="false" viewbox="0 -698 3157.2 848"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="1D6AB" d="M901 12Q901 7 892 0H479Q65 0 62 2Q56 6 56 11Q56 14 242 347T433 685Q438 694 450 696Q454 698 480 698H506L523 687Q526 683 711 354T899 17Q901 13 901 12ZM653 137L427 538L202 137L315 136H540L653 137Z"></path></g><g data-mml-node="msub" transform="translate(958,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="1D407" d="M400 0Q376 3 226 3Q75 3 51 0H39V62H147V624H39V686H51Q75 683 226 683Q376 683 400 686H412V624H304V388H595V624H487V686H499Q523 683 673 683Q824 683 848 686H860V624H752V62H860V0H848Q824 3 674 3Q523 3 499 0H487V62H595V326H304V62H412V0H400Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(933,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="1D42B" d="M405 293T374 293T324 312T305 361Q305 378 312 394Q315 397 315 399Q305 399 294 394T266 375T238 329T222 249Q221 241 221 149V62H308V0H298Q280 3 161 3Q47 3 38 0H29V62H98V210V303Q98 353 96 363T83 376Q69 380 42 380H29V442H32L118 446Q204 450 205 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380H37V442H40Z"></path></g></g></g></g></g></g></svg></mjx-container></span></h2> <ul> <li>Average bond energies can be used to estimate the enthalpy change for a reaction ( <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="6.131ex" height="1.959ex" role="img" focusable="false" viewbox="0 -716 2709.7 866"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="394" d="M51 0Q46 4 46 7Q46 9 215 357T388 709Q391 716 416 716Q439 716 444 709Q447 705 616 357T786 7Q786 4 781 0H51ZM507 344L384 596L137 92L383 91H630Q630 93 507 344Z"></path></g><g data-mml-node="msub" transform="translate(833,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 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3Q37 3 28 0H20V46H36Z"></path><path data-c="78" d="M201 0Q189 3 102 3Q26 3 17 0H11V46H25Q48 47 67 52T96 61T121 78T139 96T160 122T180 150L226 210L168 288Q159 301 149 315T133 336T122 351T113 363T107 370T100 376T94 379T88 381T80 383Q74 383 44 385H16V431H23Q59 429 126 429Q219 429 229 431H237V385Q201 381 201 369Q201 367 211 353T239 315T268 274L272 270L297 304Q329 345 329 358Q329 364 327 369T322 376T317 380T310 384L307 385H302V431H309Q324 428 408 428Q487 428 493 431H499V385H492Q443 385 411 368Q394 360 377 341T312 257L296 236L358 151Q424 61 429 57T446 50Q464 46 499 46H516V0H510H502Q494 1 482 1T457 2T432 2T414 3Q403 3 377 3T327 1L304 0H295V46H298Q309 46 320 51T331 63Q331 65 291 120L250 175Q249 174 219 133T185 88Q181 83 181 74Q181 63 188 55T206 46Q208 46 208 23V0H201Z" transform="translate(392,0)"></path><path data-c="6E" d="M41 46H55Q94 46 102 60V68Q102 77 102 91T102 122T103 161T103 203Q103 234 103 269T102 328V351Q99 370 88 376T43 385H25V408Q25 431 27 431L37 432Q47 433 65 434T102 436Q119 437 138 438T167 441T178 442H181V402Q181 364 182 364T187 369T199 384T218 402T247 421T285 437Q305 442 336 442Q450 438 463 329Q464 322 464 190V104Q464 66 466 59T477 49Q498 46 526 46H542V0H534L510 1Q487 2 460 2T422 3Q319 3 310 0H302V46H318Q379 46 379 62Q380 64 380 200Q379 335 378 343Q372 371 358 385T334 402T308 404Q263 404 229 370Q202 343 195 315T187 232V168V108Q187 78 188 68T191 55T200 49Q221 46 249 46H265V0H257L234 1Q210 2 183 2T145 3Q42 3 33 0H25V46H41Z" transform="translate(920,0)"></path></g></g></g></g></g></g></svg></mjx-container></span> ).</li> <li>For example, consider the reaction between methane and chlorine:</li> </ul> <div><span class="math-block "> <mjx-container class="MathJax" jax="SVG" display="true"><svg style="vertical-align: -0.566ex;" width="54.795ex" height="2.262ex" role="img" focusable="false" viewbox="0 -750 24219.3 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g 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24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(722,0)"></path></g></g><g data-mml-node="mo" transform="translate(22691.3,0)"><path data-c="28" d="M94 250Q94 319 104 381T127 488T164 576T202 643T244 695T277 729T302 750H315H319Q333 750 333 741Q333 738 316 720T275 667T226 581T184 443T167 250T184 58T225 -81T274 -167T316 -220T333 -241Q333 -250 318 -250H315H302L274 -226Q180 -141 137 -14T94 250Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(23080.3,0)"><g data-mml-node="mtext"><path data-c="A0" d=""></path></g><g data-mml-node="mi" transform="translate(250,0)"><path data-c="67" d="M329 409Q373 453 429 453Q459 453 472 434T485 396Q485 382 476 371T449 360Q416 360 412 390Q410 404 415 411Q415 412 416 414V415Q388 412 363 393Q355 388 355 386Q355 385 359 381T368 369T379 351T388 325T392 292Q392 230 343 187T222 143Q172 143 123 171Q112 153 112 133Q112 98 138 81Q147 75 155 75T227 73Q311 72 335 67Q396 58 431 26Q470 -13 470 -72Q470 -139 392 -175Q332 -206 250 -206Q167 -206 107 -175Q29 -140 29 -75Q29 -39 50 -15T92 18L103 24Q67 55 67 108Q67 155 96 193Q52 237 52 292Q52 355 102 398T223 442Q274 442 318 416L329 409ZM299 343Q294 371 273 387T221 404Q192 404 171 388T145 343Q142 326 142 292Q142 248 149 227T179 192Q196 182 222 182Q244 182 260 189T283 207T294 227T299 242Q302 258 302 292T299 343ZM403 -75Q403 -50 389 -34T348 -11T299 -2T245 0H218Q151 0 138 -6Q118 -15 107 -34T95 -74Q95 -84 101 -97T122 -127T170 -155T250 -167Q319 -167 361 -139T403 -75Z"></path></g></g><g data-mml-node="mo" transform="translate(23830.3,0)"><path data-c="29" d="M60 749L64 750Q69 750 74 750H86L114 726Q208 641 251 514T294 250Q294 182 284 119T261 12T224 -76T186 -143T145 -194T113 -227T90 -246Q87 -249 86 -250H74Q66 -250 63 -250T58 -247T55 -238Q56 -237 66 -225Q221 -64 221 250T66 725Q56 737 55 738Q55 746 60 749Z"></path></g></g></g></svg></mjx-container></span></div> <ul> <li>We can imagine this reaction occurring by breaking 2 bonds ( <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.025ex;" width="6.944ex" height="1.602ex" role="img" focusable="false" viewbox="0 -697 3069.4 708"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="1D402" d="M64 343Q64 502 174 599T468 697Q502 697 533 691T586 674T623 655T647 639T657 632L694 663Q703 670 711 677T723 687T730 692T735 695T740 696T746 697Q759 697 762 692T766 668V627V489V449Q766 428 762 424T742 419H732H720Q699 419 697 436Q690 498 657 545Q611 618 532 632Q522 634 496 634Q356 634 286 553Q232 488 232 343T286 133Q355 52 497 52Q597 52 650 112T704 237Q704 248 709 251T729 254H735Q750 254 755 253T763 248T766 234Q766 136 680 63T469 -11Q285 -11 175 86T64 343Z"></path></g><g data-mml-node="mo" transform="translate(1053.2,0)"><path data-c="2212" d="M119 221Q96 230 96 251T116 279Q121 281 448 281H775Q776 280 779 278T785 274T791 269T795 262T797 251Q797 230 775 221H119Z"></path></g><g data-mml-node="mi" transform="translate(2169.4,0)"><path data-c="1D407" d="M400 0Q376 3 226 3Q75 3 51 0H39V62H147V624H39V686H51Q75 683 226 683Q376 683 400 686H412V624H304V388H595V624H487V686H499Q523 683 673 683Q824 683 848 686H860V624H752V62H860V0H848Q824 3 674 3Q523 3 499 0H487V62H595V326H304V62H412V0H400Z"></path></g></g></g></g></svg></mjx-container></span> and <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.025ex;" width="8.232ex" height="1.602ex" role="img" focusable="false" viewbox="0 -697 3638.4 708"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="1D402" d="M64 343Q64 502 174 599T468 697Q502 697 533 691T586 674T623 655T647 639T657 632L694 663Q703 670 711 677T723 687T730 692T735 695T740 696T746 697Q759 697 762 692T766 668V627V489V449Q766 428 762 424T742 419H732H720Q699 419 697 436Q690 498 657 545Q611 618 532 632Q522 634 496 634Q356 634 286 553Q232 488 232 343T286 133Q355 52 497 52Q597 52 650 112T704 237Q704 248 709 251T729 254H735Q750 254 755 253T763 248T766 234Q766 136 680 63T469 -11Q285 -11 175 86T64 343Z"></path></g><g data-mml-node="mi" transform="translate(831,0)"><path data-c="1D425" d="M43 686L134 690Q225 694 226 694H232V62H301V0H292Q274 3 170 3Q67 3 49 0H40V62H109V332Q109 387 109 453T110 534Q110 593 108 605T94 620Q80 624 53 624H40V686H43Z"></path></g><g data-mml-node="mo" transform="translate(1372.2,0)"><path data-c="2212" d="M119 221Q96 230 96 251T116 279Q121 281 448 281H775Q776 280 779 278T785 274T791 269T795 262T797 251Q797 230 775 221H119Z"></path></g><g data-mml-node="mi" transform="translate(2488.4,0)"><path data-c="1D402" d="M64 343Q64 502 174 599T468 697Q502 697 533 691T586 674T623 655T647 639T657 632L694 663Q703 670 711 677T723 687T730 692T735 695T740 696T746 697Q759 697 762 692T766 668V627V489V449Q766 428 762 424T742 419H732H720Q699 419 697 436Q690 498 657 545Q611 618 532 632Q522 634 496 634Q356 634 286 553Q232 488 232 343T286 133Q355 52 497 52Q597 52 650 112T704 237Q704 248 709 251T729 254H735Q750 254 755 253T763 248T766 234Q766 136 680 63T469 -11Q285 -11 175 86T64 343Z"></path></g><g data-mml-node="mi" transform="translate(3319.4,0)"><path data-c="1D425" d="M43 686L134 690Q225 694 226 694H232V62H301V0H292Q274 3 170 3Q67 3 49 0H40V62H109V332Q109 387 109 453T110 534Q110 593 108 605T94 620Q80 624 53 624H40V686H43Z"></path></g></g></g></g></svg></mjx-container></span> ) and forming 2 bonds ( <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="6.662ex" height="1.781ex" role="img" focusable="false" viewbox="0 -705 2944.4 787"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path></g></g><g data-mml-node="mo" transform="translate(944.2,0)"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1944.4,0)"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(722,0)"></path></g></g></g></g></svg></mjx-container></span> and <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="7.404ex" height="1.762ex" role="img" focusable="false" viewbox="0 -697 3272.4 779"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="1D407" d="M400 0Q376 3 226 3Q75 3 51 0H39V62H147V624H39V686H51Q75 683 226 683Q376 683 400 686H412V624H304V388H595V624H487V686H499Q523 683 673 683Q824 683 848 686H860V624H752V62H860V0H848Q824 3 674 3Q523 3 499 0H487V62H595V326H304V62H412V0H400Z"></path></g></g><g data-mml-node="mo" transform="translate(1122.2,0)"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2122.4,0)"><g data-mml-node="mi"><path data-c="1D402" d="M64 343Q64 502 174 599T468 697Q502 697 533 691T586 674T623 655T647 639T657 632L694 663Q703 670 711 677T723 687T730 692T735 695T740 696T746 697Q759 697 762 692T766 668V627V489V449Q766 428 762 424T742 419H732H720Q699 419 697 436Q690 498 657 545Q611 618 532 632Q522 634 496 634Q356 634 286 553Q232 488 232 343T286 133Q355 52 497 52Q597 52 650 112T704 237Q704 248 709 251T729 254H735Q750 254 755 253T763 248T766 234Q766 136 680 63T469 -11Q285 -11 175 86T64 343Z"></path></g><g data-mml-node="mi" transform="translate(831,0)"><path data-c="1D425" d="M43 686L134 690Q225 694 226 694H232V62H301V0H292Q274 3 170 3Q67 3 49 0H40V62H109V332Q109 387 109 453T110 534Q110 593 108 605T94 620Q80 624 53 624H40V686H43Z"></path></g></g></g></g></svg></mjx-container></span> ). We know that when bonds break, process is endothermic (positive bond energy) and when bonds form, the process is exothermic (negative bond energy). The <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="6.131ex" height="1.959ex" role="img" focusable="false" viewbox="0 -716 2709.7 866"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="394" d="M51 0Q46 4 46 7Q46 9 215 357T388 709Q391 716 416 716Q439 716 444 709Q447 705 616 357T786 7Q786 4 781 0H51ZM507 344L384 596L137 92L383 91H630Q630 93 507 344Z"></path></g><g data-mml-node="msub" transform="translate(833,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="72" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T98 122T98 161T98 203Q98 234 98 269T98 328L97 351Q94 370 83 376T38 385H20V408Q20 431 22 431L32 432Q42 433 60 434T96 436Q112 437 131 438T160 441T171 442H174V373Q213 441 271 441H277Q322 441 343 419T364 373Q364 352 351 337T313 322Q288 322 276 338T263 372Q263 381 265 388T270 400T273 405Q271 407 250 401Q234 393 226 386Q179 341 179 207V154Q179 141 179 127T179 101T180 81T180 66V61Q181 59 183 57T188 54T193 51T200 49T207 48T216 47T225 47T235 46T245 46H276V0H267Q249 3 140 3Q37 3 28 0H20V46H36Z"></path><path data-c="78" d="M201 0Q189 3 102 3Q26 3 17 0H11V46H25Q48 47 67 52T96 61T121 78T139 96T160 122T180 150L226 210L168 288Q159 301 149 315T133 336T122 351T113 363T107 370T100 376T94 379T88 381T80 383Q74 383 44 385H16V431H23Q59 429 126 429Q219 429 229 431H237V385Q201 381 201 369Q201 367 211 353T239 315T268 274L272 270L297 304Q329 345 329 358Q329 364 327 369T322 376T317 380T310 384L307 385H302V431H309Q324 428 408 428Q487 428 493 431H499V385H492Q443 385 411 368Q394 360 377 341T312 257L296 236L358 151Q424 61 429 57T446 50Q464 46 499 46H516V0H510H502Q494 1 482 1T457 2T432 2T414 3Q403 3 377 3T327 1L304 0H295V46H298Q309 46 320 51T331 63Q331 65 291 120L250 175Q249 174 219 133T185 88Q181 83 181 74Q181 63 188 55T206 46Q208 46 208 23V0H201Z" transform="translate(392,0)"></path><path data-c="6E" d="M41 46H55Q94 46 102 60V68Q102 77 102 91T102 122T103 161T103 203Q103 234 103 269T102 328V351Q99 370 88 376T43 385H25V408Q25 431 27 431L37 432Q47 433 65 434T102 436Q119 437 138 438T167 441T178 442H181V402Q181 364 182 364T187 369T199 384T218 402T247 421T285 437Q305 442 336 442Q450 438 463 329Q464 322 464 190V104Q464 66 466 59T477 49Q498 46 526 46H542V0H534L510 1Q487 2 460 2T422 3Q319 3 310 0H302V46H318Q379 46 379 62Q380 64 380 200Q379 335 378 343Q372 371 358 385T334 402T308 404Q263 404 229 370Q202 343 195 315T187 232V168V108Q187 78 188 68T191 55T200 49Q221 46 249 46H265V0H257L234 1Q210 2 183 2T145 3Q42 3 33 0H25V46H41Z" transform="translate(920,0)"></path></g></g></g></g></g></g></svg></mjx-container></span> can then be calculated as shown below:</li> </ul> <div><span class="math-block "> <mjx-container class="MathJax" jax="SVG" display="true"><svg style="vertical-align: -5.033ex;" width="59.42ex" height="6.73ex" role="img" focusable="false" viewbox="0 -750 26263.7 2974.5"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="394" d="M51 0Q46 4 46 7Q46 9 215 357T388 709Q391 716 416 716Q439 716 444 709Q447 705 616 357T786 7Q786 4 781 0H51ZM507 344L384 596L137 92L383 91H630Q630 93 507 344Z"></path></g><g data-mml-node="msub" transform="translate(833,0)"><g data-mml-node="mi"><path data-c="1D43B" d="M228 637Q194 637 192 641Q191 643 191 649Q191 673 202 682Q204 683 219 683Q260 681 355 681Q389 681 418 681T463 682T483 682Q499 682 499 672Q499 670 497 658Q492 641 487 638H485Q483 638 480 638T473 638T464 637T455 637Q416 636 405 634T387 623Q384 619 355 500Q348 474 340 442T328 395L324 380Q324 378 469 378H614L615 381Q615 384 646 504Q674 619 674 627T617 637Q594 637 587 639T580 648Q580 650 582 660Q586 677 588 679T604 682Q609 682 646 681T740 680Q802 680 835 681T871 682Q888 682 888 672Q888 645 876 638H874Q872 638 869 638T862 638T853 637T844 637Q805 636 794 634T776 623Q773 618 704 340T634 58Q634 51 638 51Q646 48 692 46H723Q729 38 729 37T726 19Q722 6 716 0H701Q664 2 567 2Q533 2 504 2T458 2T437 1Q420 1 420 10Q420 15 423 24Q428 43 433 45Q437 46 448 46H454Q481 46 514 49Q520 50 522 50T528 55T534 64T540 82T547 110T558 153Q565 181 569 198Q602 330 602 331T457 332H312L279 197Q245 63 245 58Q245 51 253 49T303 46H334Q340 38 340 37T337 19Q333 6 327 0H312Q275 2 178 2Q144 2 115 2T69 2T48 1Q31 1 31 10Q31 12 34 24Q39 43 44 45Q48 46 59 46H65Q92 46 125 49Q139 52 144 61Q147 65 216 339T285 628Q285 635 228 637Z"></path></g><g data-mml-node="TeXAtom" transform="translate(864,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="72" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T98 122T98 161T98 203Q98 234 98 269T98 328L97 351Q94 370 83 376T38 385H20V408Q20 431 22 431L32 432Q42 433 60 434T96 436Q112 437 131 438T160 441T171 442H174V373Q213 441 271 441H277Q322 441 343 419T364 373Q364 352 351 337T313 322Q288 322 276 338T263 372Q263 381 265 388T270 400T273 405Q271 407 250 401Q234 393 226 386Q179 341 179 207V154Q179 141 179 127T179 101T180 81T180 66V61Q181 59 183 57T188 54T193 51T200 49T207 48T216 47T225 47T235 46T245 46H276V0H267Q249 3 140 3Q37 3 28 0H20V46H36Z"></path><path data-c="78" d="M201 0Q189 3 102 3Q26 3 17 0H11V46H25Q48 47 67 52T96 61T121 78T139 96T160 122T180 150L226 210L168 288Q159 301 149 315T133 336T122 351T113 363T107 370T100 376T94 379T88 381T80 383Q74 383 44 385H16V431H23Q59 429 126 429Q219 429 229 431H237V385Q201 381 201 369Q201 367 211 353T239 315T268 274L272 270L297 304Q329 345 329 358Q329 364 327 369T322 376T317 380T310 384L307 385H302V431H309Q324 428 408 428Q487 428 493 431H499V385H492Q443 385 411 368Q394 360 377 341T312 257L296 236L358 151Q424 61 429 57T446 50Q464 46 499 46H516V0H510H502Q494 1 482 1T457 2T432 2T414 3Q403 3 377 3T327 1L304 0H295V46H298Q309 46 320 51T331 63Q331 65 291 120L250 175Q249 174 219 133T185 88Q181 83 181 74Q181 63 188 55T206 46Q208 46 208 23V0H201Z" transform="translate(392,0)"></path><path data-c="6E" d="M41 46H55Q94 46 102 60V68Q102 77 102 91T102 122T103 161T103 203Q103 234 103 269T102 328V351Q99 370 88 376T43 385H25V408Q25 431 27 431L37 432Q47 433 65 434T102 436Q119 437 138 438T167 441T178 442H181V402Q181 364 182 364T187 369T199 384T218 402T247 421T285 437Q305 442 336 442Q450 438 463 329Q464 322 464 190V104Q464 66 466 59T477 49Q498 46 526 46H542V0H534L510 1Q487 2 460 2T422 3Q319 3 310 0H302V46H318Q379 46 379 62Q380 64 380 200Q379 335 378 343Q372 371 358 385T334 402T308 404Q263 404 229 370Q202 343 195 315T187 232V168V108Q187 78 188 68T191 55T200 49Q221 46 249 46H265V0H257L234 1Q210 2 183 2T145 3Q42 3 33 0H25V46H41Z" transform="translate(920,0)"></path></g></g></g></g><g data-mml-node="mo" transform="translate(3068.5,0)"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347Q722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153Q722 140 707 133H70Q56 140 56 153Z"></path></g><g data-mml-node="mi" transform="translate(4124.2,0)"><path data-c="3A3" d="M666 247Q664 244 652 126T638 4V0H351Q131 0 95 0T57 5V6Q54 12 57 17L73 36Q89 54 121 90T182 159L305 299L56 644L55 658Q55 677 60 681Q63 683 351 683H638V679Q640 674 652 564T666 447V443H626V447Q618 505 604 543T559 605Q529 626 478 631T333 637H294H189L293 494Q314 465 345 422Q400 346 400 340Q400 338 399 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391L183 394Q186 397 192 401T207 411T228 421T254 431T286 439T323 442Q401 442 461 379T522 216Q522 115 458 52T307 -11ZM182 98Q182 97 187 90T196 79T206 67T218 55T233 44T250 35T271 29T295 26Q330 26 363 46T412 113Q424 148 424 212Q424 287 412 323Q385 405 300 405Q270 405 239 390T188 347L182 339V98Z" transform="translate(3984,0)"></path><path data-c="72" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T98 122T98 161T98 203Q98 234 98 269T98 328L97 351Q94 370 83 376T38 385H20V408Q20 431 22 431L32 432Q42 433 60 434T96 436Q112 437 131 438T160 441T171 442H174V373Q213 441 271 441H277Q322 441 343 419T364 373Q364 352 351 337T313 322Q288 322 276 338T263 372Q263 381 265 388T270 400T273 405Q271 407 250 401Q234 393 226 386Q179 341 179 207V154Q179 141 179 127T179 101T180 81T180 66V61Q181 59 183 57T188 54T193 51T200 49T207 48T216 47T225 47T235 46T245 46H276V0H267Q249 3 140 3Q37 3 28 0H20V46H36Z" transform="translate(4540,0)"></path><path data-c="6F" d="M28 214Q28 309 93 378T250 448Q340 448 405 380T471 215Q471 120 407 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56T453 109V145H493V106Q492 66 490 59Q481 29 455 12T400 -6T353 12T329 54V58L327 55Q325 52 322 49T314 40T302 29T287 17T269 6T247 -2T221 -8T190 -11Q130 -11 82 20T34 107Q34 128 41 147T68 188T116 225T194 253T304 268H318V290Q318 324 312 340Q290 411 215 411Q197 411 181 410T156 406T148 403Q170 388 170 359Q170 334 154 320ZM126 106Q126 75 150 51T209 26Q247 26 276 49T315 109Q317 116 318 175Q318 233 317 233Q309 233 296 232T251 223T193 203T147 166T126 106Z" transform="translate(1944,0)"></path><path data-c="74" d="M27 422Q80 426 109 478T141 600V615H181V431H316V385H181V241Q182 116 182 100T189 68Q203 29 238 29Q282 29 292 100Q293 108 293 146V181H333V146V134Q333 57 291 17Q264 -10 221 -10Q187 -10 162 2T124 33T105 68T98 100Q97 107 97 248V385H18V422H27Z" transform="translate(2444,0)"></path><path data-c="69" d="M69 609Q69 637 87 653T131 669Q154 667 171 652T188 609Q188 579 171 564T129 549Q104 549 87 564T69 609ZM247 0Q232 3 143 3Q132 3 106 3T56 1L34 0H26V46H42Q70 46 91 49Q100 53 102 60T104 102V205V293Q104 345 102 359T88 378Q74 385 41 385H30V408Q30 431 32 431L42 432Q52 433 70 434T106 436Q123 437 142 438T171 441T182 442H185V62Q190 52 197 50T232 46H255V0H247Z" transform="translate(2833,0)"></path><path data-c="76" d="M338 431Q344 429 422 429Q479 429 503 431H508V385H497Q439 381 423 345Q421 341 356 172T288 -2Q283 -11 263 -11Q244 -11 239 -2Q99 359 98 364Q93 378 82 381T43 385H19V431H25L33 430Q41 430 53 430T79 430T104 429T122 428Q217 428 232 431H240V385H226Q187 384 184 370Q184 366 235 234L286 102L377 341V349Q377 363 367 372T349 383T335 385H331V431H338Z" transform="translate(3111,0)"></path><path data-c="65" d="M28 218Q28 273 48 318T98 391T163 433T229 448Q282 448 320 430T378 380T406 316T415 245Q415 238 408 231H126V216Q126 68 226 36Q246 30 270 30Q312 30 342 62Q359 79 369 104L379 128Q382 131 395 131H398Q415 131 415 121Q415 117 412 108Q393 53 349 21T250 -11Q155 -11 92 58T28 218ZM333 275Q322 403 238 411H236Q228 411 220 410T195 402T166 381T143 340T127 274V267H333V275Z" transform="translate(3639,0)"></path><path data-c="A0" d="" transform="translate(4083,0)"></path></g></g></g></g></g></g><g data-mml-node="mo" transform="translate(25874.7,0)"><path data-c="29" d="M60 749L64 750Q69 750 74 750H86L114 726Q208 641 251 514T294 250Q294 182 284 119T261 12T224 -76T186 -143T145 -194T113 -227T90 -246Q87 -249 86 -250H74Q66 -250 63 -250T58 -247T55 -238Q56 -237 66 -225Q221 -64 221 250T66 725Q56 737 55 738Q55 746 60 749Z"></path></g></g></g></svg></mjx-container></span></div> <ul> <li>For example, using table 9.3 in text, <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="6.131ex" height="1.959ex" role="img" focusable="false" viewbox="0 -716 2709.7 866"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="394" d="M51 0Q46 4 46 7Q46 9 215 357T388 709Q391 716 416 716Q439 716 444 709Q447 705 616 357T786 7Q786 4 781 0H51ZM507 344L384 596L137 92L383 91H630Q630 93 507 344Z"></path></g><g data-mml-node="msub" transform="translate(833,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="72" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T98 122T98 161T98 203Q98 234 98 269T98 328L97 351Q94 370 83 376T38 385H20V408Q20 431 22 431L32 432Q42 433 60 434T96 436Q112 437 131 438T160 441T171 442H174V373Q213 441 271 441H277Q322 441 343 419T364 373Q364 352 351 337T313 322Q288 322 276 338T263 372Q263 381 265 388T270 400T273 405Q271 407 250 401Q234 393 226 386Q179 341 179 207V154Q179 141 179 127T179 101T180 81T180 66V61Q181 59 183 57T188 54T193 51T200 49T207 48T216 47T225 47T235 46T245 46H276V0H267Q249 3 140 3Q37 3 28 0H20V46H36Z"></path><path data-c="78" d="M201 0Q189 3 102 3Q26 3 17 0H11V46H25Q48 47 67 52T96 61T121 78T139 96T160 122T180 150L226 210L168 288Q159 301 149 315T133 336T122 351T113 363T107 370T100 376T94 379T88 381T80 383Q74 383 44 385H16V431H23Q59 429 126 429Q219 429 229 431H237V385Q201 381 201 369Q201 367 211 353T239 315T268 274L272 270L297 304Q329 345 329 358Q329 364 327 369T322 376T317 380T310 384L307 385H302V431H309Q324 428 408 428Q487 428 493 431H499V385H492Q443 385 411 368Q394 360 377 341T312 257L296 236L358 151Q424 61 429 57T446 50Q464 46 499 46H516V0H510H502Q494 1 482 1T457 2T432 2T414 3Q403 3 377 3T327 1L304 0H295V46H298Q309 46 320 51T331 63Q331 65 291 120L250 175Q249 174 219 133T185 88Q181 83 181 74Q181 63 188 55T206 46Q208 46 208 23V0H201Z" transform="translate(392,0)"></path><path data-c="6E" d="M41 46H55Q94 46 102 60V68Q102 77 102 91T102 122T103 161T103 203Q103 234 103 269T102 328V351Q99 370 88 376T43 385H25V408Q25 431 27 431L37 432Q47 433 65 434T102 436Q119 437 138 438T167 441T178 442H181V402Q181 364 182 364T187 369T199 384T218 402T247 421T285 437Q305 442 336 442Q450 438 463 329Q464 322 464 190V104Q464 66 466 59T477 49Q498 46 526 46H542V0H534L510 1Q487 2 460 2T422 3Q319 3 310 0H302V46H318Q379 46 379 62Q380 64 380 200Q379 335 378 343Q372 371 358 385T334 402T308 404Q263 404 229 370Q202 343 195 315T187 232V168V108Q187 78 188 68T191 55T200 49Q221 46 249 46H265V0H257L234 1Q210 2 183 2T145 3Q42 3 33 0H25V46H41Z" transform="translate(920,0)"></path></g></g></g></g></g></g></svg></mjx-container></span> for the reaction above is calculated as follows:</li> </ul> <div><span class="math-block "> <mjx-container class="MathJax" jax="SVG" display="true"><svg style="vertical-align: -0.566ex;" width="81.023ex" height="2.262ex" role="img" focusable="false" viewbox="0 -750 35812.1 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="394" d="M51 0Q46 4 46 7Q46 9 215 357T388 709Q391 716 416 716Q439 716 444 709Q447 705 616 357T786 7Q786 4 781 0H51ZM507 344L384 596L137 92L383 91H630Q630 93 507 344Z"></path></g><g data-mml-node="msub" transform="translate(833,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="72" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T98 122T98 161T98 203Q98 234 98 269T98 328L97 351Q94 370 83 376T38 385H20V408Q20 431 22 431L32 432Q42 433 60 434T96 436Q112 437 131 438T160 441T171 442H174V373Q213 441 271 441H277Q322 441 343 419T364 373Q364 352 351 337T313 322Q288 322 276 338T263 372Q263 381 265 388T270 400T273 405Q271 407 250 401Q234 393 226 386Q179 341 179 207V154Q179 141 179 127T179 101T180 81T180 66V61Q181 59 183 57T188 54T193 51T200 49T207 48T216 47T225 47T235 46T245 46H276V0H267Q249 3 140 3Q37 3 28 0H20V46H36Z"></path><path data-c="78" d="M201 0Q189 3 102 3Q26 3 17 0H11V46H25Q48 47 67 52T96 61T121 78T139 96T160 122T180 150L226 210L168 288Q159 301 149 315T133 336T122 351T113 363T107 370T100 376T94 379T88 381T80 383Q74 383 44 385H16V431H23Q59 429 126 429Q219 429 229 431H237V385Q201 381 201 369Q201 367 211 353T239 315T268 274L272 270L297 304Q329 345 329 358Q329 364 327 369T322 376T317 380T310 384L307 385H302V431H309Q324 428 408 428Q487 428 493 431H499V385H492Q443 385 411 368Q394 360 377 341T312 257L296 236L358 151Q424 61 429 57T446 50Q464 46 499 46H516V0H510H502Q494 1 482 1T457 2T432 2T414 3Q403 3 377 3T327 1L304 0H295V46H298Q309 46 320 51T331 63Q331 65 291 120L250 175Q249 174 219 133T185 88Q181 83 181 74Q181 63 188 55T206 46Q208 46 208 23V0H201Z" transform="translate(392,0)"></path><path data-c="6E" d="M41 46H55Q94 46 102 60V68Q102 77 102 91T102 122T103 161T103 203Q103 234 103 269T102 328V351Q99 370 88 376T43 385H25V408Q25 431 27 431L37 432Q47 433 65 434T102 436Q119 437 138 438T167 441T178 442H181V402Q181 364 182 364T187 369T199 384T218 402T247 421T285 437Q305 442 336 442Q450 438 463 329Q464 322 464 190V104Q464 66 466 59T477 49Q498 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2 183 2T145 3Q42 3 33 0H25V46H41Z" transform="translate(920,0)"></path></g></g></g></g></g></g></svg></mjx-container></span> from tabulated <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="5.352ex" height="1.959ex" role="img" focusable="false" viewbox="0 -716 2365.6 866"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="394" d="M51 0Q46 4 46 7Q46 9 215 357T388 709Q391 716 416 716Q439 716 444 709Q447 705 616 357T786 7Q786 4 781 0H51ZM507 344L384 596L137 92L383 91H630Q630 93 507 344Z"></path></g><g data-mml-node="msub" transform="translate(833,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="66" d="M273 0Q255 3 146 3Q43 3 34 0H26V46H42Q70 46 91 49Q99 52 103 60Q104 62 104 224V385H33V431H104V497L105 564L107 574Q126 639 171 668T266 704Q267 704 275 704T289 705Q330 702 351 679T372 627Q372 604 358 590T321 576T284 590T270 627Q270 647 288 667H284Q280 668 273 668Q245 668 223 647T189 592Q183 572 182 497V431H293V385H185V225Q185 63 186 61T189 57T194 54T199 51T206 49T213 48T222 47T231 47T241 46T251 46H282V0H273Z"></path></g></g></g></g><g data-mml-node="msup" transform="translate(1929,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"></g><g data-mml-node="TeXAtom" transform="translate(33,363) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mo"><path data-c="2218" d="M55 251Q55 328 112 386T249 444T386 388T444 249Q444 171 388 113T250 55Q170 55 113 112T55 251ZM245 403Q188 403 142 361T96 250Q96 183 141 140T250 96Q284 96 313 109T354 135T375 160Q403 197 403 250Q403 313 360 358T245 403Z"></path></g></g></g></g></g></svg></mjx-container></span> values-as learned in Chapter 6-gives <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="18.612ex" height="1.959ex" role="img" focusable="false" viewbox="0 -716 8226.6 866"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="394" d="M51 0Q46 4 46 7Q46 9 215 357T388 709Q391 716 416 716Q439 716 444 709Q447 705 616 357T786 7Q786 4 781 0H51ZM507 344L384 596L137 92L383 91H630Q630 93 507 344Z"></path></g><g data-mml-node="msup" transform="translate(833,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,363) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mo"><path data-c="2218" d="M55 251Q55 328 112 386T249 444T386 388T444 249Q444 171 388 113T250 55Q170 55 113 112T55 251ZM245 403Q188 403 142 361T96 250Q96 183 141 140T250 96Q284 96 313 109T354 135T375 160Q403 197 403 250Q403 313 360 358T245 403Z"></path></g></g></g><g data-mml-node="msub" transform="translate(2019.6,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"></g><g data-mml-node="TeXAtom" transform="translate(33,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mtext"><path data-c="72" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T98 122T98 161T98 203Q98 234 98 269T98 328L97 351Q94 370 83 376T38 385H20V408Q20 431 22 431L32 432Q42 433 60 434T96 436Q112 437 131 438T160 441T171 442H174V373Q213 441 271 441H277Q322 441 343 419T364 373Q364 352 351 337T313 322Q288 322 276 338T263 372Q263 381 265 388T270 400T273 405Q271 407 250 401Q234 393 226 386Q179 341 179 207V154Q179 141 179 127T179 101T180 81T180 66V61Q181 59 183 57T188 54T193 51T200 49T207 48T216 47T225 47T235 46T245 46H276V0H267Q249 3 140 3Q37 3 28 0H20V46H36Z"></path><path data-c="78" d="M201 0Q189 3 102 3Q26 3 17 0H11V46H25Q48 47 67 52T96 61T121 78T139 96T160 122T180 150L226 210L168 288Q159 301 149 315T133 336T122 351T113 363T107 370T100 376T94 379T88 381T80 383Q74 383 44 385H16V431H23Q59 429 126 429Q219 429 229 431H237V385Q201 381 201 369Q201 367 211 353T239 315T268 274L272 270L297 304Q329 345 329 358Q329 364 327 369T322 376T317 380T310 384L307 385H302V431H309Q324 428 408 428Q487 428 493 431H499V385H492Q443 385 411 368Q394 360 377 341T312 257L296 236L358 151Q424 61 429 57T446 50Q464 46 499 46H516V0H510H502Q494 1 482 1T457 2T432 2T414 3Q403 3 377 3T327 1L304 0H295V46H298Q309 46 320 51T331 63Q331 65 291 120L250 175Q249 174 219 133T185 88Q181 83 181 74Q181 63 188 55T206 46Q208 46 208 23V0H201Z" transform="translate(392,0)"></path><path data-c="6E" d="M41 46H55Q94 46 102 60V68Q102 77 102 91T102 122T103 161T103 203Q103 234 103 269T102 328V351Q99 370 88 376T43 385H25V408Q25 431 27 431L37 432Q47 433 65 434T102 436Q119 437 138 438T167 441T178 442H181V402Q181 364 182 364T187 369T199 384T218 402T247 421T285 437Q305 442 336 442Q450 438 463 329Q464 322 464 190V104Q464 66 466 59T477 49Q498 46 526 46H542V0H534L510 1Q487 2 460 2T422 3Q319 3 310 0H302V46H318Q379 46 379 62Q380 64 380 200Q379 335 378 343Q372 371 358 385T334 402T308 404Q263 404 229 370Q202 343 195 315T187 232V168V108Q187 78 188 68T191 55T200 49Q221 46 249 46H265V0H257L234 1Q210 2 183 2T145 3Q42 3 33 0H25V46H41Z" transform="translate(920,0)"></path><path data-c="A0" d="" transform="translate(1476,0)"></path></g></g></g><g data-mml-node="mo" transform="translate(3600.8,0)"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347Q722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153Q722 140 707 133H70Q56 140 56 153Z"></path></g><g data-mml-node="mo" transform="translate(4656.6,0)"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="mn" transform="translate(5434.6,0)"><path data-c="31" d="M213 578L200 573Q186 568 160 563T102 556H83V602H102Q149 604 189 617T245 641T273 663Q275 666 285 666Q294 666 302 660V361L303 61Q310 54 315 52T339 48T401 46H427V0H416Q395 3 257 3Q121 3 100 0H88V46H114Q136 46 152 46T177 47T193 50T201 52T207 57T213 61V578Z"></path><path data-c="30" d="M96 585Q152 666 249 666Q297 666 345 640T423 548Q460 465 460 320Q460 165 417 83Q397 41 362 16T301 -15T250 -22Q224 -22 198 -16T137 16T82 83Q39 165 39 320Q39 494 96 585ZM321 597Q291 629 250 629Q208 629 178 597Q153 571 145 525T137 333Q137 175 145 125T181 46Q209 16 250 16Q290 16 318 46Q347 76 354 130T362 333Q362 478 354 524T321 597Z" transform="translate(500,0)"></path><path data-c="31" d="M213 578L200 573Q186 568 160 563T102 556H83V602H102Q149 604 189 617T245 641T273 663Q275 666 285 666Q294 666 302 660V361L303 61Q310 54 315 52T339 48T401 46H427V0H416Q395 3 257 3Q121 3 100 0H88V46H114Q136 46 152 46T177 47T193 50T201 52T207 57T213 61V578Z" transform="translate(1000,0)"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(6934.6,0)"><g data-mml-node="mtext"><path data-c="A0" d=""></path></g><g data-mml-node="mi" transform="translate(250,0)"><path data-c="6B" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T97 124T98 167T98 217T98 272T98 329Q98 366 98 407T98 482T98 542T97 586T97 603Q94 622 83 628T38 637H20V660Q20 683 22 683L32 684Q42 685 61 686T98 688Q115 689 135 690T165 693T176 694H179V463L180 233L240 287Q300 341 304 347Q310 356 310 364Q310 383 289 385H284V431H293Q308 428 412 428Q475 428 484 431H489V385H476Q407 380 360 341Q286 278 286 274Q286 273 349 181T420 79Q434 60 451 53T500 46H511V0H505Q496 3 418 3Q322 3 307 0H299V46H306Q330 48 330 65Q330 72 326 79Q323 84 276 153T228 222L176 176V120V84Q176 65 178 59T189 49Q210 46 238 46H254V0H246Q231 3 137 3T28 0H20V46H36Z"></path><path data-c="4A" d="M89 177Q115 177 133 160T152 112Q152 88 137 72T102 52Q99 51 101 49Q106 43 129 29Q159 15 190 15Q232 15 256 48T286 126Q286 127 286 142T286 183T286 238T287 306T287 378Q287 403 287 429T287 479T287 524T286 563T286 593T286 614V621Q281 630 263 633T182 637H154V683H166Q187 680 332 680Q439 680 457 683H465V637H449Q422 637 401 634Q393 631 389 623Q388 621 388 376T387 123Q377 61 322 20T194 -22Q188 -22 177 -21T160 -20Q96 -9 61 29T25 110Q25 144 44 160T89 177Z" transform="translate(528,0)"></path></g></g></g></g></svg></mjx-container></span>, which is fairly close to the value obtained from average bond energies.</li> <li>To summarize:</li> <li>Breaking a chemical bond always requires energy, while forming a chemical bond always releases energy.</li> <li>A reaction is exothermic when weak bonds break and strong bonds form.</li> <li>A reaction is endothermic when strong bonds break and weak bonds form.</li> </ul> <h2 type="section" data-unnumbered="true" id="examples%3A-8" class="section-title"> Examples:</h2> <ol> <li>Use average bond energy values from table 9.3 in textbook to calculate <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="6.131ex" height="1.959ex" role="img" focusable="false" viewbox="0 -716 2709.7 866"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mi"><path data-c="394" d="M51 0Q46 4 46 7Q46 9 215 357T388 709Q391 716 416 716Q439 716 444 709Q447 705 616 357T786 7Q786 4 781 0H51ZM507 344L384 596L137 92L383 91H630Q630 93 507 344Z"></path></g><g data-mml-node="msub" transform="translate(833,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="72" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T98 122T98 161T98 203Q98 234 98 269T98 328L97 351Q94 370 83 376T38 385H20V408Q20 431 22 431L32 432Q42 433 60 434T96 436Q112 437 131 438T160 441T171 442H174V373Q213 441 271 441H277Q322 441 343 419T364 373Q364 352 351 337T313 322Q288 322 276 338T263 372Q263 381 265 388T270 400T273 405Q271 407 250 401Q234 393 226 386Q179 341 179 207V154Q179 141 179 127T179 101T180 81T180 66V61Q181 59 183 57T188 54T193 51T200 49T207 48T216 47T225 47T235 46T245 46H276V0H267Q249 3 140 3Q37 3 28 0H20V46H36Z"></path><path data-c="78" d="M201 0Q189 3 102 3Q26 3 17 0H11V46H25Q48 47 67 52T96 61T121 78T139 96T160 122T180 150L226 210L168 288Q159 301 149 315T133 336T122 351T113 363T107 370T100 376T94 379T88 381T80 383Q74 383 44 385H16V431H23Q59 429 126 429Q219 429 229 431H237V385Q201 381 201 369Q201 367 211 353T239 315T268 274L272 270L297 304Q329 345 329 358Q329 364 327 369T322 376T317 380T310 384L307 385H302V431H309Q324 428 408 428Q487 428 493 431H499V385H492Q443 385 411 368Q394 360 377 341T312 257L296 236L358 151Q424 61 429 57T446 50Q464 46 499 46H516V0H510H502Q494 1 482 1T457 2T432 2T414 3Q403 3 377 3T327 1L304 0H295V46H298Q309 46 320 51T331 63Q331 65 291 120L250 175Q249 174 219 133T185 88Q181 83 181 74Q181 63 188 55T206 46Q208 46 208 23V0H201Z" transform="translate(392,0)"></path><path data-c="6E" d="M41 46H55Q94 46 102 60V68Q102 77 102 91T102 122T103 161T103 203Q103 234 103 269T102 328V351Q99 370 88 376T43 385H25V408Q25 431 27 431L37 432Q47 433 65 434T102 436Q119 437 138 438T167 441T178 442H181V402Q181 364 182 364T187 369T199 384T218 402T247 421T285 437Q305 442 336 442Q450 438 463 329Q464 322 464 190V104Q464 66 466 59T477 49Q498 46 526 46H542V0H534L510 1Q487 2 460 2T422 3Q319 3 310 0H302V46H318Q379 46 379 62Q380 64 380 200Q379 335 378 343Q372 371 358 385T334 402T308 404Q263 404 229 370Q202 343 195 315T187 232V168V108Q187 78 188 68T191 55T200 49Q221 46 249 46H265V0H257L234 1Q210 2 183 2T145 3Q42 3 33 0H25V46H41Z" transform="translate(920,0)"></path></g></g></g></g></g></g></svg></mjx-container></span> for the reaction shown below:</li> </ol> <div><span class="math-block "> <mjx-container class="MathJax" jax="SVG" display="true"><svg style="vertical-align: -0.566ex;" width="40.97ex" height="2.262ex" role="img" focusable="false" viewbox="0 -750 18108.7 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z" transform="translate(722,0)"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1505,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="34" d="M462 0Q444 3 333 3Q217 3 199 0H190V46H221Q241 46 248 46T265 48T279 53T286 61Q287 63 287 115V165H28V211L179 442Q332 674 334 675Q336 677 355 677H373L379 671V211H471V165H379V114Q379 73 379 66T385 54Q393 47 442 46H471V0H462ZM293 211V545L74 212L183 211H293Z"></path></g></g></g><g data-mml-node="mo" transform="translate(1908.6,0)"><path data-c="28" d="M94 250Q94 319 104 381T127 488T164 576T202 643T244 695T277 729T302 750H315H319Q333 750 333 741Q333 738 316 720T275 667T226 581T184 443T167 250T184 58T225 -81T274 -167T316 -220T333 -241Q333 -250 318 -250H315H302L274 -226Q180 -141 137 -14T94 250Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2297.6,0)"><g data-mml-node="mtext"><path data-c="A0" d=""></path></g><g data-mml-node="mi" transform="translate(250,0)"><path data-c="67" d="M329 409Q373 453 429 453Q459 453 472 434T485 396Q485 382 476 371T449 360Q416 360 412 390Q410 404 415 411Q415 412 416 414V415Q388 412 363 393Q355 388 355 386Q355 385 359 381T368 369T379 351T388 325T392 292Q392 230 343 187T222 143Q172 143 123 171Q112 153 112 133Q112 98 138 81Q147 75 155 75T227 73Q311 72 335 67Q396 58 431 26Q470 -13 470 -72Q470 -139 392 -175Q332 -206 250 -206Q167 -206 107 -175Q29 -140 29 -75Q29 -39 50 -15T92 18L103 24Q67 55 67 108Q67 155 96 193Q52 237 52 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transform="translate(16969.7,0)"><g data-mml-node="mtext"><path data-c="A0" d=""></path></g><g data-mml-node="mi" transform="translate(250,0)"><path data-c="67" d="M329 409Q373 453 429 453Q459 453 472 434T485 396Q485 382 476 371T449 360Q416 360 412 390Q410 404 415 411Q415 412 416 414V415Q388 412 363 393Q355 388 355 386Q355 385 359 381T368 369T379 351T388 325T392 292Q392 230 343 187T222 143Q172 143 123 171Q112 153 112 133Q112 98 138 81Q147 75 155 75T227 73Q311 72 335 67Q396 58 431 26Q470 -13 470 -72Q470 -139 392 -175Q332 -206 250 -206Q167 -206 107 -175Q29 -140 29 -75Q29 -39 50 -15T92 18L103 24Q67 55 67 108Q67 155 96 193Q52 237 52 292Q52 355 102 398T223 442Q274 442 318 416L329 409ZM299 343Q294 371 273 387T221 404Q192 404 171 388T145 343Q142 326 142 292Q142 248 149 227T179 192Q196 182 222 182Q244 182 260 189T283 207T294 227T299 242Q302 258 302 292T299 343ZM403 -75Q403 -50 389 -34T348 -11T299 -2T245 0H218Q151 0 138 -6Q118 -15 107 -34T95 -74Q95 -84 101 -97T122 -127T170 -155T250 -167Q319 -167 361 -139T403 -75Z"></path></g></g><g data-mml-node="mo" transform="translate(17719.7,0)"><path data-c="29" d="M60 749L64 750Q69 750 74 750H86L114 726Q208 641 251 514T294 250Q294 182 284 119T261 12T224 -76T186 -143T145 -194T113 -227T90 -246Q87 -249 86 -250H74Q66 -250 63 -250T58 -247T55 -238Q56 -237 66 -225Q221 -64 221 250T66 725Q56 737 55 738Q55 746 60 749Z"></path></g></g></g></svg></mjx-container></span></div> <h2 type="section" data-unnumbered="true" id="bond-lengths" class="section-title"> BOND LENGTHS</h2> <ul> <li>The average bond length represents the length of a bond between two particular atoms in a large number of compunds. Listed below are the average bond lengths for some common bonds.</li> </ul> <div class="table_tabular" style="text-align: center"> <div class="inline-tabular"><table class="tabular"> <tbody> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">Bond</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">Bond Length (pm)</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">Bond</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">Bond Length (pm)</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">Bond</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; 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border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">120</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">H-F</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">92</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; 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border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="6.725ex" height="1.781ex" role="img" focusable="false" viewbox="0 -705 2972.4 787"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="mo" transform="translate(972.2,0)"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1972.4,0)"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(722,0)"></path></g></g></g></g></svg></mjx-container></span></td> <td style="text-align: left; 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border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">121</td> </tr> </tbody> </table> </div></div> <ul> <li>Like bond energies, bond lengths depend not only on the kind of atoms involved in a bond, but also on the type of bond: single, double or triple. In general, for a particular pair of atoms, triple bonds are shorter than double bonds, which in turn are shorter than single bonds. For example, compare the bond lengths (and bond strengths) of the various <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="6.033ex" height="1.781ex" role="img" focusable="false" viewbox="0 -705 2666.4 787"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path></g></g><g data-mml-node="mo" transform="translate(944.2,0)"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1944.4,0)"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path></g></g></g></g></svg></mjx-container></span> bonds:</li> </ul> <div class="table_tabular" style="text-align: center"> <div class="inline-tabular"><table class="tabular"> <tbody> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">Bond</td> <td style="text-align: center; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">Bond Length (pm)</td> <td style="text-align: center; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">Bond Strength (kJ/mol)</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.048ex;" width="6.284ex" height="1.643ex" role="img" focusable="false" viewbox="0 -705 2777.6 726"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path></g></g><g data-mml-node="mo" transform="translate(999.8,0)"><path data-c="2261" d="M56 444Q56 457 70 464H707Q722 456 722 444Q722 430 706 424H72Q56 429 56 444ZM56 237T56 250T70 270H707Q722 262 722 250T707 230H70Q56 237 56 250ZM56 56Q56 71 72 76H706Q722 70 722 56Q722 44 707 36H70Q56 43 56 56Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2055.6,0)"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path></g></g></g></g></svg></mjx-container></span></td> <td style="text-align: center; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">120 pm</td> <td style="text-align: center; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.566ex;" width="11.093ex" height="2.262ex" role="img" focusable="false" viewbox="0 -750 4903 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mn"><path data-c="38" d="M70 417T70 494T124 618T248 666Q319 666 374 624T429 515Q429 485 418 459T392 417T361 389T335 371T324 363L338 354Q352 344 366 334T382 323Q457 264 457 174Q457 95 399 37T249 -22Q159 -22 101 29T43 155Q43 263 172 335L154 348Q133 361 127 368Q70 417 70 494ZM286 386L292 390Q298 394 301 396T311 403T323 413T334 425T345 438T355 454T364 471T369 491T371 513Q371 556 342 586T275 624Q268 625 242 625Q201 625 165 599T128 534Q128 511 141 492T167 463T217 431Q224 426 228 424L286 386ZM250 21Q308 21 350 55T392 137Q392 154 387 169T375 194T353 216T330 234T301 253T274 270Q260 279 244 289T218 306L210 311Q204 311 181 294T133 239T107 157Q107 98 150 60T250 21Z"></path><path data-c="33" d="M127 463Q100 463 85 480T69 524Q69 579 117 622T233 665Q268 665 277 664Q351 652 390 611T430 522Q430 470 396 421T302 350L299 348Q299 347 308 345T337 336T375 315Q457 262 457 175Q457 96 395 37T238 -22Q158 -22 100 21T42 130Q42 158 60 175T105 193Q133 193 151 175T169 130Q169 119 166 110T159 94T148 82T136 74T126 70T118 67L114 66Q165 21 238 21Q293 21 321 74Q338 107 338 175V195Q338 290 274 322Q259 328 213 329L171 330L168 332Q166 335 166 348Q166 366 174 366Q202 366 232 371Q266 376 294 413T322 525V533Q322 590 287 612Q265 626 240 626Q208 626 181 615T143 592T132 580H135Q138 579 143 578T153 573T165 566T175 555T183 540T186 520Q186 498 172 481T127 463Z" transform="translate(500,0)"></path><path data-c="37" d="M55 458Q56 460 72 567L88 674Q88 676 108 676H128V672Q128 662 143 655T195 646T364 644H485V605L417 512Q408 500 387 472T360 435T339 403T319 367T305 330T292 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0H25V46H41Z"></path><path data-c="6F" d="M28 214Q28 309 93 378T250 448Q340 448 405 380T471 215Q471 120 407 55T250 -10Q153 -10 91 57T28 214ZM250 30Q372 30 372 193V225V250Q372 272 371 288T364 326T348 362T317 390T268 410Q263 411 252 411Q222 411 195 399Q152 377 139 338T126 246V226Q126 130 145 91Q177 30 250 30Z" transform="translate(833,0)"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(1333,0)"></path></g></g></g></g></svg></mjx-container></span></td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="6.284ex" height="1.781ex" role="img" focusable="false" viewbox="0 -705 2777.6 787"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path></g></g><g data-mml-node="mo" transform="translate(999.8,0)"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347Q722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153Q722 140 707 133H70Q56 140 56 153Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2055.6,0)"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path></g></g></g></g></svg></mjx-container></span></td> <td style="text-align: center; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">134 pm</td> <td style="text-align: center; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.566ex;" width="11.093ex" height="2.262ex" role="img" focusable="false" viewbox="0 -750 4903 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mn"><path data-c="36" d="M42 313Q42 476 123 571T303 666Q372 666 402 630T432 550Q432 525 418 510T379 495Q356 495 341 509T326 548Q326 592 373 601Q351 623 311 626Q240 626 194 566Q147 500 147 364L148 360Q153 366 156 373Q197 433 263 433H267Q313 433 348 414Q372 400 396 374T435 317Q456 268 456 210V192Q456 169 451 149Q440 90 387 34T253 -22Q225 -22 199 -14T143 16T92 75T56 172T42 313ZM257 397Q227 397 205 380T171 335T154 278T148 216Q148 133 160 97T198 39Q222 21 251 21Q302 21 329 59Q342 77 347 104T352 209Q352 289 347 316T329 361Q302 397 257 397Z"></path><path data-c="31" d="M213 578L200 573Q186 568 160 563T102 556H83V602H102Q149 604 189 617T245 641T273 663Q275 666 285 666Q294 666 302 660V361L303 61Q310 54 315 52T339 48T401 46H427V0H416Q395 3 257 3Q121 3 100 0H88V46H114Q136 46 152 46T177 47T193 50T201 52T207 57T213 61V578Z" transform="translate(500,0)"></path><path data-c="31" d="M213 578L200 573Q186 568 160 563T102 556H83V602H102Q149 604 189 617T245 641T273 663Q275 666 285 666Q294 666 302 660V361L303 61Q310 54 315 52T339 48T401 46H427V0H416Q395 3 257 3Q121 3 100 0H88V46H114Q136 46 152 46T177 47T193 50T201 52T207 57T213 61V578Z" transform="translate(1000,0)"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1500,0)"><g data-mml-node="mtext"><path data-c="A0" d=""></path></g><g data-mml-node="mi" transform="translate(250,0)"><path data-c="6B" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T97 124T98 167T98 217T98 272T98 329Q98 366 98 407T98 482T98 542T97 586T97 603Q94 622 83 628T38 637H20V660Q20 683 22 683L32 684Q42 685 61 686T98 688Q115 689 135 690T165 693T176 694H179V463L180 233L240 287Q300 341 304 347Q310 356 310 364Q310 383 289 385H284V431H293Q308 428 412 428Q475 428 484 431H489V385H476Q407 380 360 341Q286 278 286 274Q286 273 349 181T420 79Q434 60 451 53T500 46H511V0H505Q496 3 418 3Q322 3 307 0H299V46H306Q330 48 330 65Q330 72 326 79Q323 84 276 153T228 222L176 176V120V84Q176 65 178 59T189 49Q210 46 238 46H254V0H246Q231 3 137 3T28 0H20V46H36Z"></path><path data-c="4A" d="M89 177Q115 177 133 160T152 112Q152 88 137 72T102 52Q99 51 101 49Q106 43 129 29Q159 15 190 15Q232 15 256 48T286 126Q286 127 286 142T286 183T286 238T287 306T287 378Q287 403 287 429T287 479T287 524T286 563T286 593T286 614V621Q281 630 263 633T182 637H154V683H166Q187 680 332 680Q439 680 457 683H465V637H449Q422 637 401 634Q393 631 389 623Q388 621 388 376T387 123Q377 61 322 20T194 -22Q188 -22 177 -21T160 -20Q96 -9 61 29T25 110Q25 144 44 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2T699 3Q596 3 587 0H579V46H595Q656 46 656 62Q657 64 657 200Q656 335 655 343Q649 371 635 385T611 402T585 404Q540 404 506 370Q479 343 472 315T464 232V168V108Q464 78 465 68T468 55T477 49Q498 46 526 46H542V0H534L510 1Q487 2 460 2T422 3Q319 3 310 0H302V46H318Q379 46 379 62Q380 64 380 200Q379 335 378 343Q372 371 358 385T334 402T308 404Q263 404 229 370Q202 343 195 315T187 232V168V108Q187 78 188 68T191 55T200 49Q221 46 249 46H265V0H257L234 1Q210 2 183 2T145 3Q42 3 33 0H25V46H41Z"></path><path data-c="6F" d="M28 214Q28 309 93 378T250 448Q340 448 405 380T471 215Q471 120 407 55T250 -10Q153 -10 91 57T28 214ZM250 30Q372 30 372 193V225V250Q372 272 371 288T364 326T348 362T317 390T268 410Q263 411 252 411Q222 411 195 399Q152 377 139 338T126 246V226Q126 130 145 91Q177 30 250 30Z" transform="translate(833,0)"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(1333,0)"></path></g></g></g></g></svg></mjx-container></span></td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left: none !important; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="6.033ex" height="1.781ex" role="img" focusable="false" viewbox="0 -705 2666.4 787"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path></g></g><g data-mml-node="mo" transform="translate(944.2,0)"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1944.4,0)"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path></g></g></g></g></svg></mjx-container></span></td> <td style="text-align: center; border-right: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">154 pm</td> <td style="text-align: center; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">347 kJ mol</td> </tr> </tbody> </table> </div></div> <div>© 2014 Pearson Education, Inc.</div> <ul> <li>Note that as the bond gets longer, it also gets weaker. The relationship between the length of the bond and the strength of the bond does not necessarily hold true for all bonds. Consider the series of nitrogen-halogen bonds shown below:</li> </ul> <div class="table_tabular" style="text-align: center"> <div class="inline-tabular"><table class="tabular"> <tbody> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">Bond</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">Bond Length (pm)</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top-style: solid !important; border-top-width: 1px !important; width: auto; vertical-align: middle; ">Bond Strength (kJ/mol)</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">N-F</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">139</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">272</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="6.725ex" height="1.781ex" role="img" focusable="false" viewbox="0 -705 2972.4 787"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z"></path></g></g><g data-mml-node="mo" transform="translate(972.2,0)"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1972.4,0)"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 685 67 686T104 688Q121 689 141 690T171 693T182 694H185V379Q185 62 186 60Q190 52 198 49Q219 46 247 46H263V0H255L232 1Q209 2 183 2T145 3T107 3T57 1L34 0H26V46H42Z" transform="translate(722,0)"></path></g></g></g></g></svg></mjx-container></span></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">191</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">200</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; "><span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="6.951ex" height="1.731ex" role="img" focusable="false" viewbox="0 -683 3072.4 765"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z"></path></g></g><g data-mml-node="mo" transform="translate(972.2,0)"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1972.4,0)"><g data-mml-node="mi"><path data-c="42" d="M131 622Q124 629 120 631T104 634T61 637H28V683H229H267H346Q423 683 459 678T531 651Q574 627 599 590T624 512Q624 461 583 419T476 360L466 357Q539 348 595 302T651 187Q651 119 600 67T469 3Q456 1 242 0H28V46H61Q103 47 112 49T131 61V622ZM511 513Q511 560 485 594T416 636Q415 636 403 636T371 636T333 637Q266 637 251 636T232 628Q229 624 229 499V374H312L396 375L406 377Q410 378 417 380T442 393T474 417T499 456T511 513ZM537 188Q537 239 509 282T430 336L329 337H229V200V116Q229 57 234 52Q240 47 334 47H383Q425 47 443 53Q486 67 511 104T537 188Z"></path><path data-c="72" d="M36 46H50Q89 46 97 60V68Q97 77 97 91T98 122T98 161T98 203Q98 234 98 269T98 328L97 351Q94 370 83 376T38 385H20V408Q20 431 22 431L32 432Q42 433 60 434T96 436Q112 437 131 438T160 441T171 442H174V373Q213 441 271 441H277Q322 441 343 419T364 373Q364 352 351 337T313 322Q288 322 276 338T263 372Q263 381 265 388T270 400T273 405Q271 407 250 401Q234 393 226 386Q179 341 179 207V154Q179 141 179 127T179 101T180 81T180 66V61Q181 59 183 57T188 54T193 51T200 49T207 48T216 47T225 47T235 46T245 46H276V0H267Q249 3 140 3Q37 3 28 0H20V46H36Z" transform="translate(708,0)"></path></g></g></g></g></svg></mjx-container></span></td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">214</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">243</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: left; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">N-I</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">222</td> <td style="text-align: left; border-right-style: solid !important; border-right-width: 1px !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; border-top: none !important; width: auto; vertical-align: middle; ">159</td> </tr> <tr style="border-top: none !important; border-bottom: none !important;"> <td style="text-align: center; border-left-style: solid !important; border-left-width: 1px !important; border-right-style: solid !important; border-right-width: 1px !important; border-bottom: none !important; border-top: none !important; border-bottom-style: solid !important; border-bottom-width: 1px !important; " colspan="3">© 2014 Pearson Education, Inc.</td> </tr> </tbody> </table> </div></div> <ul> <li>Although the bonds generally get weaker as they get longer, the trend is not a smooth one.</li> </ul> <h2 type="section" data-unnumbered="true" id="bond-order" class="section-title"> BOND ORDER</h2> <ul> <li>Bond order,defined in terms of the Lewis formula, is the number of pairs of electrons in a bond. Therefore, a single bond has a bond order of 1, a double bond has a bond order of 2 and a triple bond has a bond order of 3 .</li> <li>Bond length depends on bond order. As the bond order increases, the bond strength increases and the nuclei are pulled inward, decreasing bond length. For example, the average <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="6.033ex" height="1.781ex" role="img" focusable="false" viewbox="0 -705 2666.4 787"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path></g></g><g data-mml-node="mo" transform="translate(944.2,0)"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1944.4,0)"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path></g></g></g></g></svg></mjx-container></span> single bond has a bond length of 154 pm , whereas <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="6.284ex" height="1.781ex" role="img" focusable="false" viewbox="0 -705 2777.6 787"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path></g></g><g data-mml-node="mo" transform="translate(999.8,0)"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347Q722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153Q722 140 707 133H70Q56 140 56 153Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2055.6,0)"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path></g></g></g></g></svg></mjx-container></span> is 134 pm long and <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.048ex;" width="6.284ex" height="1.643ex" role="img" focusable="false" viewbox="0 -705 2777.6 726"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path></g></g><g data-mml-node="mo" transform="translate(999.8,0)"><path data-c="2261" d="M56 444Q56 457 70 464H707Q722 456 722 444Q722 430 706 424H72Q56 429 56 444ZM56 237T56 250T70 270H707Q722 262 722 250T707 230H70Q56 237 56 250ZM56 56Q56 71 72 76H706Q722 70 722 56Q722 44 707 36H70Q56 43 56 56Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2055.6,0)"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path></g></g></g></g></svg></mjx-container></span> is 120 pm long.</li> <li>When determining bond order in molecules that have resonance structures, the total pair of electrons is divided by the total number of bonds, commonly yielding fractional bond orders. For example, the bond order of <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="6.286ex" height="1.781ex" role="img" focusable="false" viewbox="0 -705 2778.4 787"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z"></path></g></g><g data-mml-node="mo" transform="translate(1000.2,0)"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(2000.4,0)"><g data-mml-node="mi"><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z"></path></g></g></g></g></svg></mjx-container></span> bonds in ozone (with 2 resonance structures) is calculated as shown below:</li> </ul> <div>Bond order <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.798ex;" width="30.121ex" height="3.006ex" role="img" focusable="false" viewbox="0 -975.7 13313.3 1328.5"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mo"><path data-c="3D" d="M56 347Q56 360 70 367H707Q722 359 722 347Q722 336 708 328L390 327H72Q56 332 56 347ZM56 153Q56 168 72 173H708Q722 163 722 153Q722 140 707 133H70Q56 140 56 153Z"></path></g><g data-mml-node="mfrac" transform="translate(1055.8,0)"><g data-mml-node="mtext" transform="translate(337.4,477.2) scale(0.707)"><path data-c="A0" d=""></path><path data-c="74" d="M27 422Q80 426 109 478T141 600V615H181V431H316V385H181V241Q182 116 182 100T189 68Q203 29 238 29Q282 29 292 100Q293 108 293 146V181H333V146V134Q333 57 291 17Q264 -10 221 -10Q187 -10 162 2T124 33T105 68T98 100Q97 107 97 248V385H18V422H27Z" transform="translate(250,0)"></path><path data-c="6F" d="M28 214Q28 309 93 378T250 448Q340 448 405 380T471 215Q471 120 407 55T250 -10Q153 -10 91 57T28 214ZM250 30Q372 30 372 193V225V250Q372 272 371 288T364 326T348 362T317 390T268 410Q263 411 252 411Q222 411 195 399Q152 377 139 338T126 246V226Q126 130 145 91Q177 30 250 30Z" transform="translate(639,0)"></path><path data-c="74" d="M27 422Q80 426 109 478T141 600V615H181V431H316V385H181V241Q182 116 182 100T189 68Q203 29 238 29Q282 29 292 100Q293 108 293 146V181H333V146V134Q333 57 291 17Q264 -10 221 -10Q187 -10 162 2T124 33T105 68T98 100Q97 107 97 248V385H18V422H27Z" transform="translate(1139,0)"></path><path data-c="61" d="M137 305T115 305T78 320T63 359Q63 394 97 421T218 448Q291 448 336 416T396 340Q401 326 401 309T402 194V124Q402 76 407 58T428 40Q443 40 448 56T453 109V145H493V106Q492 66 490 59Q481 29 455 12T400 -6T353 12T329 54V58L327 55Q325 52 322 49T314 40T302 29T287 17T269 6T247 -2T221 -8T190 -11Q130 -11 82 20T34 107Q34 128 41 147T68 188T116 225T194 253T304 268H318V290Q318 324 312 340Q290 411 215 411Q197 411 181 410T156 406T148 403Q170 388 170 359Q170 334 154 320ZM126 106Q126 75 150 51T209 26Q247 26 276 49T315 109Q317 116 318 175Q318 233 317 233Q309 233 296 232T251 223T193 203T147 166T126 106Z" transform="translate(1528,0)"></path><path data-c="6C" d="M42 46H56Q95 46 103 60V68Q103 77 103 91T103 124T104 167T104 217T104 272T104 329Q104 366 104 407T104 482T104 542T103 586T103 603Q100 622 89 628T44 637H26V660Q26 683 28 683L38 684Q48 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123 658T178 642T253 634Q324 634 389 662Q397 666 402 666Q410 666 410 648V635Q328 538 205 538Q174 538 149 544L139 546V374Q158 388 169 396T205 412T256 420Q337 420 393 355T449 201Q449 109 385 44T229 -22Q148 -22 99 32T50 154Q50 178 61 192T84 210T107 214Q132 214 148 197T164 157Z" transform="translate(778,0)"></path></g></g></g></svg></mjx-container></span><br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-24.jpg?height=85&width=697&top_left_y=1048&top_left_x=1267" alt="" data-align="center" /></figure></div> <h2 type="section" data-unnumbered="true" id="examples%3A-9" class="section-title"> Examples:</h2> <ol> <li>Consider the molecules <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.439ex;" width="9.625ex" height="1.984ex" role="img" focusable="false" viewbox="0 -683 4254.3 877"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g><g data-mml-node="msub" transform="translate(1186.6,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="34" d="M462 0Q444 3 333 3Q217 3 199 0H190V46H221Q241 46 248 46T265 48T279 53T286 61Q287 63 287 115V165H28V211L179 442Q332 674 334 675Q336 677 355 677H373L379 671V211H471V165H379V114Q379 73 379 66T385 54Q393 47 442 46H471V0H462ZM293 211V545L74 212L183 211H293Z"></path></g></g></g><g data-mml-node="mo" transform="translate(2373.1,0)"><path data-c="2C" d="M78 35T78 60T94 103T137 121Q165 121 187 96T210 8Q210 -27 201 -60T180 -117T154 -158T130 -185T117 -194Q113 -194 104 -185T95 -172Q95 -168 106 -156T131 -126T157 -76T173 -3V9L172 8Q170 7 167 6T161 3T152 1T140 0Q113 0 96 17Z"></path></g><g data-mml-node="msub" transform="translate(2817.8,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mtext"><path data-c="A0" d=""></path></g><g data-mml-node="mi" transform="translate(250,0)"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(1033,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g></g></g></svg></mjx-container></span> and <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.339ex;" width="5.715ex" height="1.885ex" role="img" focusable="false" viewbox="0 -683 2526.1 833"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="msub"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g><g data-mml-node="msub" transform="translate(1186.6,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mtext"><path data-c="A0" d=""></path></g><g data-mml-node="mi" transform="translate(250,0)"><path data-c="46" d="M128 619Q121 626 117 628T101 631T58 634H25V680H582V676Q584 670 596 560T610 444V440H570V444Q563 493 561 501Q555 538 543 563T516 601T477 622T431 631T374 633H334H286Q252 633 244 631T233 621Q232 619 232 490V363H284Q287 363 303 363T327 364T349 367T372 373T389 385Q407 403 410 459V480H450V200H410V221Q407 276 389 296Q381 303 371 307T348 313T327 316T303 317T284 317H232V189L233 61Q240 54 245 52T270 48T333 46H360V0H348Q324 3 182 3Q51 3 36 0H25V46H58Q100 47 109 49T128 61V619Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(936,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g></g></g></svg></mjx-container></span>. Which molecule has the shortest <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="6.159ex" height="1.731ex" role="img" focusable="false" viewbox="0 -683 2722.4 765"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z"></path></g></g><g data-mml-node="mo" transform="translate(972.2,0)"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1972.4,0)"><g data-mml-node="mi"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z"></path></g></g></g></g></svg></mjx-container></span> bond length? Which molecule has the longest <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.186ex;" width="6.159ex" height="1.731ex" role="img" focusable="false" viewbox="0 -683 2722.4 765"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z"></path></g></g><g data-mml-node="mo" transform="translate(972.2,0)"><path data-c="2212" d="M84 237T84 250T98 270H679Q694 262 694 250T679 230H98Q84 237 84 250Z"></path></g><g data-mml-node="TeXAtom" data-mjx-texclass="ORD" transform="translate(1972.4,0)"><g data-mml-node="mi"><path data-c="4E" d="M42 46Q74 48 94 56T118 69T128 86V634H124Q114 637 52 637H25V683H232L235 680Q237 679 322 554T493 303L578 178V598Q572 608 568 613T544 627T492 637H475V683H483Q498 680 600 680Q706 680 715 683H724V637H707Q634 633 622 598L621 302V6L614 0H600Q585 0 582 3T481 150T282 443T171 605V345L172 86Q183 50 257 46H274V0H265Q250 3 150 3Q48 3 33 0H25V46H42Z"></path></g></g></g></g></svg></mjx-container></span> bond length?</li> <li>Oxalic acid <span class="math-inline "> <mjx-container class="MathJax" jax="SVG"><svg style="vertical-align: -0.566ex;" width="9.814ex" height="2.262ex" role="img" focusable="false" viewbox="0 -750 4337.7 1000"><g stroke="currentColor" fill="currentColor" stroke-width="0" transform="scale(1,-1)"><g data-mml-node="math"><g data-mml-node="mrow"><g data-mml-node="mo"><path data-c="28" d="M94 250Q94 319 104 381T127 488T164 576T202 643T244 695T277 729T302 750H315H319Q333 750 333 741Q333 738 316 720T275 667T226 581T184 443T167 250T184 58T225 -81T274 -167T316 -220T333 -241Q333 -250 318 -250H315H302L274 -226Q180 -141 137 -14T94 250Z"></path></g><g data-mml-node="msub" transform="translate(389,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="48" d="M128 622Q121 629 117 631T101 634T58 637H25V683H36Q57 680 180 680Q315 680 324 683H335V637H302Q262 636 251 634T233 622L232 500V378H517V622Q510 629 506 631T490 634T447 637H414V683H425Q446 680 569 680Q704 680 713 683H724V637H691Q651 636 640 634T622 622V61Q628 51 639 49T691 46H724V0H713Q692 3 569 3Q434 3 425 0H414V46H447Q489 47 498 49T517 61V332H232V197L233 61Q239 51 250 49T302 46H335V0H324Q303 3 180 3Q45 3 36 0H25V46H58Q100 47 109 49T128 61V622Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(783,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g><g data-mml-node="msub" transform="translate(1575.6,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="43" d="M56 342Q56 428 89 500T174 615T283 681T391 705Q394 705 400 705T408 704Q499 704 569 636L582 624L612 663Q639 700 643 704Q644 704 647 704T653 705H657Q660 705 666 699V419L660 413H626Q620 419 619 430Q610 512 571 572T476 651Q457 658 426 658Q322 658 252 588Q173 509 173 342Q173 221 211 151Q232 111 263 84T328 45T384 29T428 24Q517 24 571 93T626 244Q626 251 632 257H660L666 251V236Q661 133 590 56T403 -21Q262 -21 159 83T56 342Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(755,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="32" d="M109 429Q82 429 66 447T50 491Q50 562 103 614T235 666Q326 666 387 610T449 465Q449 422 429 383T381 315T301 241Q265 210 201 149L142 93L218 92Q375 92 385 97Q392 99 409 186V189H449V186Q448 183 436 95T421 3V0H50V19V31Q50 38 56 46T86 81Q115 113 136 137Q145 147 170 174T204 211T233 244T261 278T284 308T305 340T320 369T333 401T340 431T343 464Q343 527 309 573T212 619Q179 619 154 602T119 569T109 550Q109 549 114 549Q132 549 151 535T170 489Q170 464 154 447T109 429Z"></path></g></g></g><g data-mml-node="msub" transform="translate(2734.1,0)"><g data-mml-node="TeXAtom" data-mjx-texclass="ORD"><g data-mml-node="mi"><path data-c="4F" d="M56 340Q56 423 86 494T164 610T270 680T388 705Q521 705 621 601T722 341Q722 260 693 191T617 75T510 4T388 -22T267 3T160 74T85 189T56 340ZM467 647Q426 665 388 665Q360 665 331 654T269 620T213 549T179 439Q174 411 174 354Q174 144 277 61Q327 20 385 20H389H391Q474 20 537 99Q603 188 603 354Q603 411 598 439Q577 592 467 647Z"></path></g></g><g data-mml-node="TeXAtom" transform="translate(811,-150) scale(0.707)" data-mjx-texclass="ORD"><g data-mml-node="mn"><path data-c="34" d="M462 0Q444 3 333 3Q217 3 199 0H190V46H221Q241 46 248 46T265 48T279 53T286 61Q287 63 287 115V165H28V211L179 442Q332 674 334 675Q336 677 355 677H373L379 671V211H471V165H379V114Q379 73 379 66T385 54Q393 47 442 46H471V0H462ZM293 211V545L74 212L183 211H293Z"></path></g></g></g><g data-mml-node="mo" transform="translate(3948.7,0)"><path data-c="29" d="M60 749L64 750Q69 750 74 750H86L114 726Q208 641 251 514T294 250Q294 182 284 119T261 12T224 -76T186 -143T145 -194T113 -227T90 -246Q87 -249 86 -250H74Q66 -250 63 -250T58 -247T55 -238Q56 -237 66 -225Q221 -64 221 250T66 725Q56 737 55 738Q55 746 60 749Z"></path></g></g></g></g></svg></mjx-container></span> has the structural arrangement shown below. Complete the Lewis structure for this molecule and compare the length and strength of the carbon-oxygen bonds.<br /> <figure style="text-align: center"><img src="https://cdn.mathpix.com/cropped/83fc12a6-f9c8-49aa-943a-8e8b60b2f342-24.jpg?height=147&width=338&top_left_y=2013&top_left_x=803" alt="" data-align="center" /></figure></li> </ol> </div> </div> </main> <footer> <p><small>Converted for LibreTexts accessibility compliance</small></p> </footer>
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