Chemistry - Atomic Structure Question with Solution | TestHub

(A) Hund’s rules are strictly for ground states, and may not apply to excited states.

(B) An s-orbital ($l=0$) has $m=0$ only, so $m=-1$ is impossible.

(C) A d-orbital can hold a maximum of 10 electrons. (True, but the option in your answer key is not selected; check: maybe referring to a specific orbital rather than a subshell).

(D) dₓ²₋ᵧ² and dₓᵧ have two nodal planes.