Tne number of 'd' electron is `Fe^(+2)(Z=26)` is equal to that of the

Options

A. p-electrons in in Ne
B. s-electron in Mg
C. s-electron in O
D. p-electron in `C1^(-)`

Answer

A,B

Explanation

`Fe^(+2) to 1s^(s) 2s ^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(6)` ("total d-electrons=6")
`Ne to 1s^(s) 2s ^(2) 2p^(6) `("total electrons=6")
`Mg to 1s^(s) 2s ^(2) 2p^(6) 3s^(2)` ("total electrons=6")
`O to 1s^(2) 2s^(2) 2p^(4)` ("total electrons=4")
`Cl^(-) to 1s^(s) 2s ^(2) 2p^(6) 3s^(2) 3p^(6)` ("total p electrons=12")