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The ground state configuration of Fe^(3+...

The ground state configuration of `Fe^(3+)` ion in gaseous state is: (At. No. of Fe = 26)

A

`[Ar]^(18)3d^(3)4s^(2)`

B

`[Ar]^(18)3d^(6)4s^(2)`

C

`[Ar]^(18)3d^(5)`

D

`[Ar]^(18)3d^(6)`

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C
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