试题 试卷
题型:单选题 题类:常考题 难易度:容易
上海市同济大学第二附属中学2018-2019学年高一上学期化学期中考试试卷
①Ca2+:1s22s22p63s23p6
②F﹣:1s22s23p6
③P:
④Cr:1s22s22p63s23p63d44s2
⑤Fe:1s22s22p63s23p63d64s2
⑥Mg2+:1s22s22p6
⑦C:
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