题目内容
A.Ca2+?1s22s22p63s23p6? B.F 1s22s23p6??
C.S 1s22s22p63s23p4? D.Ar 1s22s22p63s23p6??
A.Ca2+ 1s22s22p63s23p6 B.F- 1s22s23p5
C.S 1s22s22p63s23p4 D.Ar 1s22s22p63s23p6
A.Ca2+ 1s22s22p63s23p6 B.F- 1s22s23p6