The number of d-electrons `Fe^(2+)`(Z=26) is not equal to that to the

Options

A. p-electron in Ne(at no. =10)
B. d-electrons in Mn (at. No=25)
C. d-elecrons in Fe
D. p-electrons in `F^(-)` (at no of F=9)

Answer

B

Explanation

`Fe^(2+): [Ar]3d^(6)` has six d-electrons
`Ne:1s^(2)2s^(2)2p^(6)` has six p-electrons
`Mn:[Ar]3d^(5)4s^(2)` has five d-electrons
`Fe:[Ar]3d^(6)s^(2)` has six d-electrons
`F^(-):[Ne]3s^(2)3p^(6)`has six p - electrons.