What is the number of unpaired electrons of n | vedclass

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(D) The oxidation state of $Ni$ in $[Ni(CN)_4]^{-2}$ is $+2$. The electronic configuration of $Ni$ is $[Ar] 3d^8 4s^2$. The electronic configuration o

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zero

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(D) The oxidation state of $Ni$ in $[Ni(CN)_4]^{-2}$ is $+2$. The electronic configuration of $Ni$ is $[Ar] 3d^8 4s^2$. The electronic configuration of $Ni^{+2}$ is $[Ar] 3d^8$. Since $CN^-$ is a strong field ligand,it causes the pairing of electrons in the $3d$ orbitals. After pairing,all $8$ electrons in the $3d$ subshell are paired,leaving zero unpaired electrons.

What is the number of unpaired electrons of nickel observed in $[Ni(CN)_4]^{-2}$?

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