Models of Matter A.3 Electron Configurations (id: cea1f4fe8)

本题目来源于试卷: Models of Matter A.3 Electron Configurations，类别为 IB化学

[单选题]
How many unpaired electrons in the $Mn^{2+}$ ion?

A. 5
B. 3
C. 1
D. 2


参考答案:  A


本题详细解析:

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