The number of unpaired electrons in Mn^{3+} i | vedclass

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Question

(A) The atomic number of $Mn$ is $25$. The electronic configuration of $Mn$ is $[Ar] 3d^5 4s^2$.When $Mn$ forms $Mn^{3+}$ ion,it loses three electrons

Vedclass · Accepted Answer

$4$

Vedclass · Answer

(A) The atomic number of $Mn$ is $25$. The electronic configuration of $Mn$ is $[Ar] 3d^5 4s^2$.When $Mn$ forms $Mn^{3+}$ ion,it loses three electrons (two from $4s$ and one from $3d$ orbital).Therefore,the electronic configuration of $Mn^{3+}$ is $[Ar] 3d^4$.In the $3d^4$ configuration,there are $4$ unpaired electrons in the $d$-orbitals.Thus,the correct option is $A$.

The number of unpaired electrons in $Mn^{3+}$ is

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