The numbers of d-electrons retained in $F e^{2 +}$ (atomic number $F e = 26$ ) ion is:

3

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4

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5

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6

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Solution

The correct option is B $6$

$F e = 26 \Rightarrow 4 s^{2} 3 d^{6}$

$F e^{2 +} = 4 s^{0} 3 d^{6}$

Number of electrons retained in d-orbital= $6$ .

Hence, the correct option is $D$ .

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(A t o m i c n u m b e r o f F e = 26)

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