Consider the ground state `Cr` atom `(Z = 24)`. The number of electron with the azimuthal number `l = 1` and `2` ,respectively are

Options

A. `12`and `4`
B. `12`and `5`
C. `16`and `4`
D. `16` and `5`

Answer

B

Explanation

`(Z = 24): 1s^(2) 2s^(2)2p^(6)3s^(2)3p^(6)3d^(5)4s^(1)`
`l = 1` designates `p` subshell, thus, the total number of such electrons is `6 +6 = 12.l = 2` designates `d` subshell, thus, the total number of such electrons is `5`.