A.1 B.2 C.3 D.4
A.3d34s2 B.3d5 C.3s23p63d5 D.3s23p63d34s2
A.ψ(1,1,0) B.ψ(2,1,0) C.ψ(3,2,0,) D.ψ(5,3,0)