Correct configuration of `Fe^"+3"` [26] is

Options

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

Answer

A

Explanation

`""_(26)Fe=1s^(2),2s^(2)2p^(6),3s^(2)3p^(6)3d^(6),4s^(2)`
`Fe^(3+)=1s^(2),2s^(2)2p^(6),3s^(2)3p^(6)3d^(5)`.