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Q.

The electronic configuration of Iron is

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a

$[A r] 4 s^{2} 3 d^{6}$

b

$[A r] 4 s^{2} 3 d^{1}$

c

$[A r] 4 s^{2} 3 d^{3}$

d

$[A r] 4 s^{2} 3 d^{8}$

answer is A.

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Detailed Solution

$F e - 26 - 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{6}$

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