Which of the following is the correct electronic configuration of `Fe^(3+)` ion ? (Z for Fe= 26)

Options

A. `1s^2 , 2s^2 , 2p^6 , 3s^2 , 3p^6 , 3d^4 4s^1`
B. `1s^2, 2s^2 , 2p^6 , 3s^2 , 3d^3 , 4s^2`
C. `1s^2 , 2s^2 , 2p^6 , 3s^2 , 3p^6 , 3d^5`
D. `1s^2 , 2s^2 , 2p^6 , 3s^2 , 3p^6 , 3d^5 , 4s^2 , 4p^3`

Answer

C

Explanation

23 `e^-` only