Question

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

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

Answer 1

Answer: (D)

12 and 5

Answer 2

$24 \longrightarrow 1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}3d^{5}$ $l = 1 ? p \longrightarrow 12$ $l = 2 ? d \longrightarrow 5$