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]4d^(5)4s^(1)`

Answer

A

Explanation

3d subshell filled with 5 electrons (half-filled) is more stable than that filled with 4 electrons. 1, 4s electron jump into 3d subshell for more stability.