Models of Matter A.3 Electron Configurations (id: cf7dee344)

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 electrons are lost in the formation of a copper (II) ion from a copper atom?

A. One 3s electron and one 3d electron
B. One 4s electron and one 3d electron
C. Two 4s electrons
D. Two 3d electrons


参考答案:  B


本题详细解析:
$Cu$ has the electron configuration $\ce{[Ar]}\, 4s^1 3d^{10}$ [Ar]$4s^13d^{10}$(a full d-subshell is more stable). The $4s$ electron is lost in the first ionization followed by a $3d$ electron.

微信扫一扫，分享更方便