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

`""_(24)Cr to 1s^(2), 2s^(2), 2p^(6), 3s^(2), 3p^(6), 3d^(5), 4s^(1)" " l=1, l=1, l=2`
(we know for p, `l` = 1 and for d, `l`=2).
For `l=1`, total number of electrons = 12
For `l=2`, total number of electron = 5.