The correct ground state electronic configuration of chromium atom is

Options

A. `[Ar]3d^(5)4s^(1)`
B. `[Ar]3d^(4)4s^(2)`
C. `[Ar]3d^(6)4s^(0)`
D. `[Ar]3d^(5)4s^(2)`

Answer

A

Explanation

`Cr(Z = 24)`
`[Ar]3d^(6)4s^(1)`
This is because `d^(5)` is a more half -filled configuration Reason for the stablity of half-filled and fallty filled ortained are symmetry and excharge energy