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  4. The number of unpaired electron in Mn2+ is

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Q. The number of unpaired electron in $ Mn^{2+} $ is

BHUBHU 2007

Solution:

$Mn =(25)=3 d^{5} 4 s^{2}$
$Mn ^{2+}=(23)=3 d^{5} 4 s^{0}$
image
Five unpaired electrons are present in $d$ subshell of $Mn ^{2+}$.