A neutral atom of an element has the ground-state electronic configuration . Calculate the total num — Atomic Structure Chemistry Question

💡 Solution & Explanation

The atom is Chromium ($Z=24$). The subshells with their electrons are: $1s^2$ ($l=0, m=0 \rightarrow 2e^-$), $2s^2$ ($l=0, m=0 \rightarrow 2e^-$), $2p^6$ ($l=1, m=-1,0,1 \rightarrow 2e^-$ in $m=0$), $3s^2$ ($l=0, m=0 \rightarrow 2e^-$), $3p^6$ ($l=1, m=-1,0,1 \rightarrow 2e^-$ in $m=0$), $4s^1$ ($l=0, m=0 \rightarrow 1e^-$), $3d^5$ ($l=2, m=-2,-1,0,1,2 \rightarrow 1e^-$ in $m=0$ as they are singly occupied). Total = $2+2+2+2+2+1+1 = 12$.