Which of the following ions are diamagnetic?

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(C) Ions are diamagnetic if all the electrons are paired in their electronic configuration. Electronic configuration of $Zn^{2+}$ is $[Ar] 3d^{10}$. S

Vedclass · Accepted Answer

$Zn^{+2}$

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(C) Ions are diamagnetic if all the electrons are paired in their electronic configuration. Electronic configuration of $Zn^{2+}$ is $[Ar] 3d^{10}$. Since all $10$ electrons in the $3d$ subshell are paired,$Zn^{2+}$ is diamagnetic. In contrast,$Cr^{3+} ([Ar] 3d^3)$,$Fe^{3+} ([Ar] 3d^5)$,and $Mn^{2+} ([Ar] 3d^5)$ all contain unpaired electrons and are therefore paramagnetic.

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