Which have the same number of $s$ -electrons as the $d$ -electrons in $F e^{2 +}$ ?

L i

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N a

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N

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P

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Solution

The correct option is A $P$
From figure it can be seen that,
$P$ has $6$ electrons in $s$ -sub-shells as in $d$ -shell of $F e^{2 +}$ .

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