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题型:单选题 题类:常考题 难易度:普通
原子核外电子排布c
①Ca2+:1s22s22p63s23p6
②F﹣:1s22s23p6
③P:
④Cr:1s22s22p63s23p63d44s2
⑤Fe:1s22s22p63s23p63d64s2
⑥Mg2+:1s22s22p6
⑦C:
①光气(COCl2)②六氟化硫③HCHO④三氟化硼⑤PCl3⑥PCl5⑦NO2⑧二氟化氙⑨N2⑩CH4 .
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