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(b)Highest magnetic moment depends upon number of unpaired electron since

$C{r^{2 + }} = 3{d^4}4{s^0}$, $M{n^{2 + }} = 3{d^5}4{s^0}$

$C{u^{2 + }

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$M{n^{2 + }}$

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(b)Highest magnetic moment depends upon number of unpaired electron since

$C{r^{2 + }} = 3{d^4}4{s^0}$, $M{n^{2 + }} = 3{d^5}4{s^0}$

$C{u^{2 + }} = 3{d^9}4{s^0}$, $C{o^{2 + }} = 3{d^7}4{s^0}$, $N{i^{2 + }} = 3{d^6}4{s^0}$

So $M{n^{2 + }}$ contain maximum number of unpaired electron i.e. $5.$

Which of the following species is expected to show the highest magnetic moment? (At. Nos.: $Cr=24$, $Mn = 25$, $Co = 27$, $Ni = 28$, $Cu = 29)$

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