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",[341,2178,2180],{"className":2179,"jax":345},[344],[347,2181,2185],{"style":999,"xmlns":350,"width":2182,"height":2183,"role":353,"focusable":354,"viewBox":2184},"1.176ex","1.593ex","0 -694 520 704",[357,2186,2187],{"stroke":359,"fill":359,"stroke-width":360,"transform":361},[357,2188,2189],{"dataMmlNode":364},[357,2190,2191],{"dataMmlNode":414},[369,2192],{"dataC":2193,"d":2194},"1D451","M366 683Q367 683 438 688T511 694Q523 694 523 686Q523 679 450 384T375 83T374 68Q374 26 402 26Q411 27 422 35Q443 55 463 131Q469 151 473 152Q475 153 483 153H487H491Q506 153 506 145Q506 140 503 129Q490 79 473 48T445 8T417 -8Q409 -10 393 -10Q359 -10 336 5T306 36L300 51Q299 52 296 50Q294 48 292 46Q233 -10 172 -10Q117 -10 75 30T33 157Q33 205 53 255T101 341Q148 398 195 420T280 442Q336 442 364 400Q369 394 369 396Q370 400 396 505T424 616Q424 629 417 632T378 637H357Q351 643 351 645T353 664Q358 683 366 683ZM352 326Q329 405 277 405Q242 405 210 374T160 293Q131 214 119 129Q119 126 119 118T118 106Q118 61 136 44T179 26Q233 26 290 98L298 109L352 326Z"," 电子也是价电子",[992,2197,2198],{},"价层电子对数： 成键电子对数 和 孤电子对数 的和",[470,2200,2202],{"id":2201},"情况二-题目给定结构式","情况二 题目给定结构式",[992,2204,2205,2206,2219,2220,2233],{},"看最外层电子数可以形成几个共价键（包含 ",[341,2207,2209],{"className":2208,"jax":345},[344],[347,2210,2211],{"style":404,"xmlns":350,"width":405,"height":406,"role":353,"focusable":354,"viewBox":407},[357,2212,2213],{"stroke":359,"fill":359,"stroke-width":360,"transform":361},[357,2214,2215],{"dataMmlNode":364},[357,2216,2217],{"dataMmlNode":414},[369,2218],{"dataC":417,"d":418}," 键和 ",[341,2221,2223],{"className":2222,"jax":345},[344],[347,2224,2225],{"style":404,"xmlns":350,"width":453,"height":406,"role":353,"focusable":354,"viewBox":454},[357,2226,2227],{"stroke":359,"fill":359,"stroke-width":360,"transform":361},[357,2228,2229],{"dataMmlNode":364},[357,2230,2231],{"dataMmlNode":414},[369,2232],{"dataC":463,"d":464}," 键），剩余的电子数\u002F2，即为孤电子对数。如果是阳离子（或阴离子），则最外层电子数减去（或加上）其电荷的绝对值",[989,2235,2236,2328,2335,2411],{},[2237,2238,2239],"ol",{},[314,2240,2241,2245,2246,2327],{},[2242,2243,2244],"span",{}," 2020 全国卷 Ⅲ"," ",[341,2247,2249],{"className":2248,"jax":345},[344],[347,2250,2254],{"style":1851,"xmlns":350,"width":2251,"height":2252,"role":353,"focusable":354,"viewBox":2253},"6.519ex","2.479ex","0 -833.2 2881.2 1095.8",[357,2255,2256],{"stroke":359,"fill":359,"stroke-width":360,"transform":361},[357,2257,2258],{"dataMmlNode":364},[357,2259,2260,2268,2289,2296],{"dataMmlNode":1104,"dataMjxTexclass":1105},[357,2261,2262],{"dataMmlNode":1104,"dataMjxTexclass":1105},[357,2263,2264],{"dataMmlNode":414},[369,2265],{"dataC":2266,"d":2267},"42","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",[357,2269,2271,2279],{"dataMmlNode":1290,"transform":2270},"translate(708,0)",[357,2272,2273],{"dataMmlNode":1104,"dataMjxTexclass":1105},[357,2274,2275],{"dataMmlNode":1104,"dataMjxTexclass":1105},[357,2276,2277],{"dataMmlNode":1298},[357,2278],{"dataMmlNode":1301},[357,2280,2281],{"dataMmlNode":1104,"transform":1304,"dataMjxTexclass":1105},[357,2282,2283],{"dataMmlNode":1104,"dataMjxTexclass":1105},[357,2284,2285],{"dataMmlNode":1298},[357,2286,2287],{"dataMmlNode":713},[369,2288],{"dataC":1495,"d":1496},[357,2290,2292],{"dataMmlNode":1104,"dataMjxTexclass":1105,"transform":2291},"translate(1144.6,0)",[357,2293,2294],{"dataMmlNode":414},[369,2295],{"dataC":1581,"d":1582},[357,2297,2299,2307,2317],{"dataMmlNode":1585,"transform":2298},"translate(1894.6,0)",[357,2300,2301],{"dataMmlNode":1104,"dataMjxTexclass":1105},[357,2302,2303],{"dataMmlNode":1104,"dataMjxTexclass":1105},[357,2304,2305],{"dataMmlNode":1298},[357,2306],{"dataMmlNode":1301},[357,2308,2309,2313],{"dataMmlNode":1104,"transform":1597,"dataMjxTexclass":1105},[357,2310,2311],{"dataMmlNode":713},[369,2312],{"dataC":1495,"d":1496},[357,2314,2315],{"dataMmlNode":490,"transform":1516},[369,2316],{"dataC":750,"d":751},[357,2318,2319],{"dataMmlNode":1104,"transform":1604,"dataMjxTexclass":1105},[357,2320,2321],{"dataMmlNode":1104,"dataMjxTexclass":1105},[357,2322,2323],{"dataMmlNode":1298},[357,2324,2325],{"dataMmlNode":713},[369,2326],{"dataC":1349,"d":1350}," 的结构为：",[992,2329,2330],{},[353,2331],{"alt":2332,"src":2333,"style":2334},"","https:\u002F\u002Fptg90phsi6rf8j7h.public.blob.vercel-storage.com\u002Fchemistry\u002F1.1.svg","height:100px;",[992,2336,2337,2356,2357,2374,2375],{},[341,2338,2340],{"className":2339,"jax":345},[344],[347,2341,2344],{"style":1058,"xmlns":350,"width":2342,"height":1623,"role":353,"focusable":354,"viewBox":2343},"1.602ex","0 -683 708 683",[357,2345,2346],{"stroke":359,"fill":359,"stroke-width":360,"transform":361},[357,2347,2348],{"dataMmlNode":364},[357,2349,2350],{"dataMmlNode":1104,"dataMjxTexclass":1105},[357,2351,2352],{"dataMmlNode":1104,"dataMjxTexclass":1105},[357,2353,2354],{"dataMmlNode":414},[369,2355],{"dataC":2266,"d":2267}," 原子最外层有 3 个电子，有 3 个电子形成共价键，无孤电子对，因此 ",[341,2358,2360],{"className":2359,"jax":345},[344],[347,2361,2362],{"style":1058,"xmlns":350,"width":2342,"height":1623,"role":353,"focusable":354,"viewBox":2343},[357,2363,2364],{"stroke":359,"fill":359,"stroke-width":360,"transform":361},[357,2365,2366],{"dataMmlNode":364},[357,2367,2368],{"dataMmlNode":1104,"dataMjxTexclass":1105},[357,2369,2370],{"dataMmlNode":1104,"dataMjxTexclass":1105},[357,2371,2372],{"dataMmlNode":414},[369,2373],{"dataC":2266,"d":2267}," 原子的杂化轨道类型为：",[318,2376,2377],{},[341,2378,2380],{"className":2379,"jax":345},[344],[347,2381,2386],{"style":2382,"xmlns":350,"width":2383,"height":2384,"role":353,"focusable":354,"viewBox":2385},"vertical-align: -0.439ex;","3.187ex","2.326ex","0 -833.9 1408.6 1027.9",[357,2387,2388],{"stroke":359,"fill":359,"stroke-width":360,"transform":361},[357,2389,2390,2396],{"dataMmlNode":364},[357,2391,2392],{"dataMmlNode":414},[369,2393],{"dataC":2394,"d":2395},"1D460","M131 289Q131 321 147 354T203 415T300 442Q362 442 390 415T419 355Q419 323 402 308T364 292Q351 292 340 300T328 326Q328 342 337 354T354 372T367 378Q368 378 368 379Q368 382 361 388T336 399T297 405Q249 405 227 379T204 326Q204 301 223 291T278 274T330 259Q396 230 396 163Q396 135 385 107T352 51T289 7T195 -10Q118 -10 86 19T53 87Q53 126 74 143T118 160Q133 160 146 151T160 120Q160 94 142 76T111 58Q109 57 108 57T107 55Q108 52 115 47T146 34T201 27Q237 27 263 38T301 66T318 97T323 122Q323 150 302 164T254 181T195 196T148 231Q131 256 131 289Z",[357,2397,2400,2406],{"dataMmlNode":2398,"transform":2399},"msup","translate(469,0)",[357,2401,2402],{"dataMmlNode":414},[369,2403],{"dataC":2404,"d":2405},"1D45D","M23 287Q24 290 25 295T30 317T40 348T55 381T75 411T101 433T134 442Q209 442 230 378L240 387Q302 442 358 442Q423 442 460 395T497 281Q497 173 421 82T249 -10Q227 -10 210 -4Q199 1 187 11T168 28L161 36Q160 35 139 -51T118 -138Q118 -144 126 -145T163 -148H188Q194 -155 194 -157T191 -175Q188 -187 185 -190T172 -194Q170 -194 161 -194T127 -193T65 -192Q-5 -192 -24 -194H-32Q-39 -187 -39 -183Q-37 -156 -26 -148H-6Q28 -147 33 -136Q36 -130 94 103T155 350Q156 355 156 364Q156 405 131 405Q109 405 94 377T71 316T59 280Q57 278 43 278H29Q23 284 23 287ZM178 102Q200 26 252 26Q282 26 310 49T356 107Q374 141 392 215T411 325V331Q411 405 350 405Q339 405 328 402T306 393T286 380T269 365T254 350T243 336T235 326L232 322Q232 321 229 308T218 264T204 212Q178 106 178 102Z",[357,2407,2409],{"dataMmlNode":713,"transform":2408},"translate(536,363) scale(0.707)",[369,2410],{"dataC":724,"d":725},[2237,2412,2414],{"start":2413},2,[314,2415,2416,2419,2420,2437,2438,2455,2456],{},[353,2417],{"alt":2332,"src":2418},"https:\u002F\u002Fptg90phsi6rf8j7h.public.blob.vercel-storage.com\u002Fchemistry\u002F1.2.svg"," 中的 ",[341,2421,2423],{"className":2422,"jax":345},[344],[347,2424,2425],{"style":1058,"xmlns":350,"width":1622,"height":1623,"role":353,"focusable":354,"viewBox":1624},[357,2426,2427],{"stroke":359,"fill":359,"stroke-width":360,"transform":361},[357,2428,2429],{"dataMmlNode":364},[357,2430,2431],{"dataMmlNode":1104,"dataMjxTexclass":1105},[357,2432,2433],{"dataMmlNode":1104,"dataMjxTexclass":1105},[357,2434,2435],{"dataMmlNode":414},[369,2436],{"dataC":1577,"d":1578}," 最外层有 5 个电子，由 3 个电子形成共价键，因此，还剩下 2 个电子未形成共价键，因此， ",[341,2439,2441],{"className":2440,"jax":345},[344],[347,2442,2443],{"style":1058,"xmlns":350,"width":1622,"height":1623,"role":353,"focusable":354,"viewBox":1624},[357,2444,2445],{"stroke":359,"fill":359,"stroke-width":360,"transform":361},[357,2446,2447],{"dataMmlNode":364},[357,2448,2449],{"dataMmlNode":1104,"dataMjxTexclass":1105},[357,2450,2451],{"dataMmlNode":1104,"dataMjxTexclass":1105},[357,2452,2453],{"dataMmlNode":414},[369,2454],{"dataC":1577,"d":1578}," 原子含一个孤电子对，杂化轨道类型为：",[318,2457,2458],{},[341,2459,2461],{"className":2460,"jax":345},[344],[347,2462,2465],{"style":2382,"xmlns":350,"width":2383,"height":2463,"role":353,"focusable":354,"viewBox":2464},"2.324ex","0 -833.2 1408.6 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