Which element from the following does NOT exh | vedclass

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(D) The spin-only magnetic moment is calculated using the formula $\mu = \sqrt{n(n+2)} 	ext{ BM}$,where $n$ is the number of unpaired electrons. $1.$

Vedclass · Accepted Answer

$Sc$

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(D) The spin-only magnetic moment is calculated using the formula $\mu = \sqrt{n(n+2)} 	ext{ BM}$,where $n$ is the number of unpaired electrons. $1.$ $Sc$ $(Z=21)$: $[Ar] 3d^1 4s^2$. In the $+3$ state,$Sc^{3+}$ is $[Ar] 3d^0$. Here,$n=0$,so $\mu = 0 	ext{ BM}$. $2.$ $Ti$ $(Z=22)$: $[Ar] 3d^2 4s^2$. In the $+3$ state,$Ti^{3+}$ is $[Ar] 3d^1$. Here,$n=1$,so $\mu = \sqrt{3} 	ext{ BM}$. $3.$ $V$ $(Z=23)$: $[Ar] 3d^3 4s^2$. In the $+3$ state,$V^{3+}$ is $[Ar] 3d^2$. Here,$n=2$,so $\mu = \sqrt{8} 	ext{ BM}$. $4.$ $Cr$ $(Z=24)$: $[Ar] 3d^5 4s^1$. In the $+3$ state,$Cr^{3+}$ is $[Ar] 3d^3$. Here,$n=3$,so $\mu = \sqrt{15} 	ext{ BM}$. Therefore,$Sc$ does not exhibit a spin-only magnetic moment in the $+3$ state because it has no unpaired electrons.

Which element from the following does $NOT$ exhibit a spin-only magnetic moment in the $+3$ oxidation state?

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