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

Options

A. p- electrons in Ne (Z = 10)
B. s- electrons Mg (Z = 12)
C. p- electrons in CI (Z = 17)
D. d- electrtons in Fe (Z = 26)

Answer

C

Explanation

`Fe(3d^(6) 4s^(2)) rarr Fe^(2+) (3d^(6))`
`Ne (1s^(2) 2s^(2) 2p^(6)), Mg (1s^(2) 2s^(2) 2p^(6) 3s^(2))` and `CI(1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(5))`
Thus, Fe has six 3d electrons, `Fe^(2+)` has six 3d electrons, Ne has six 2p electrons, Mg has six s- electrons and CI has eleven p elements.