Models of Matter A.3 Electron Configurations (id: 74e595547)

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

[单选题]
Which of the below gives the correct electron configuration of a $Cr^{3+}$ ion?

A. [Ar]$4s^13d^2$
B. [Ar]$4s^23d^1$
C. [Ar]$3d^3$
D. [Ar]$3d^4$


参考答案:  C


本题详细解析:
Electron configuration of the $\ce{Cr}$ atom is [Ar]$4s^13d^5$.

The loss of one s and two d electrons results in [Ar]$3d^3$ configuration.

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