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. 16 and 5
C. 16 and 4
D. 12 and 5

Answer

D

Explanation

`Cr(Z = 24) : 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(1) 3d^(5)`
l = 1 corresponds to p-subshell.
No. of electrons to p-subshell.
l = 2 corresponds in -d-subshell `= 6+6 = 12`.
No. of electrons in d-subshell =5.