Question

Consider the ground state of Cr atom (X =24). The number of electrons with the azimuthal quantum numbers, I = 1 and 2 are, respectively

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

Answer 1

The correct option is B

12 and 5

Electron configuration of Cr atom(Z=24)
$=1s^2,2S^{2}2p^6,3s^{2}3p^{6}3d^5,4s^1$
When I=1, p-subshell, Numbers of electrons = 12
When I=2, d-subshell,
Numbers of electtrons = 5