A.1S2,1S22S22P2,1S22S22P6,1S22S22P63S1 B.1S22S22P63S1,1S22S22P6,1S22S22P2,1S2 C.1S2,1S22S22P6,1S22S22P2,1S22S22P63S1 D.1S22S22P63S1,1S22S22P2,1S22S22P6,1S2
A.Ⅰ或Ⅵ B.Ⅰ或Ⅶ C.Ⅱ或Ⅵ D.Ⅱ或Ⅶ
A.ds區(qū),第三周期,IIB族 B.d區(qū),第三周期,VI族 C.d區(qū),第四周期,VIII族 D.ds區(qū),第四周期,IB族