Which one of the following is paramagnetic?

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Question

(B) Paramagnetic substances are those that contain one or more unpaired electrons.$1$. $Zn^{2+}$ $(Z=30)$: Electronic configuration is $[Ar] 3d^{10}$.

Vedclass · Accepted Answer

$Ni^{2+}$

Vedclass · Answer

(B) Paramagnetic substances are those that contain one or more unpaired electrons.$1$. $Zn^{2+}$ $(Z=30)$: Electronic configuration is $[Ar] 3d^{10}$. It has $0$ unpaired electrons (diamagnetic).$2$. $Ni^{2+}$ $(Z=28)$: Electronic configuration is $[Ar] 3d^8$. It has $2$ unpaired electrons (paramagnetic).$3$. $Cu^{+}$ $(Z=29)$: Electronic configuration is $[Ar] 3d^{10}$. It has $0$ unpaired electrons (diamagnetic).Therefore,$Ni^{2+}$ is paramagnetic.

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