A.1s22s22p4 B.1s22s22p63s23p6 C.1s22s22p3 D.1s22s22p63d1
A.2,1,-1,+1/2 B.2,0,0,-1/2 C.3,1,1,-1/2 D.3,2,-1,+1/2
A.3,1,+1,-1/2 B.2,1,-1,+1/2 C.3,3,0,+1/2 D.4,3,-3,-1/2