Chemistry - Atomic Structure Question with Solution | TestHub

A. Maximum $n$ has no fixed value of 7; theoretically $n=1,2,3,\dots$.

B. For $n=2$, only 2 subshells (2s, 2p) exist, not 4; maximum electrons = 8.

C. He has 1s². Its 4ᵗʰ excited state corresponds to $n=5$, giving at most $n^2=25$ orbitals, not 50.

D. In multi-electron species, 5d is generally higher in energy than 5p, but for H-like species they are degenerate.

Incorrect statements: A, B, C, D