A.Na+:1s22s22p6 B.F:1s22s22p5 C.O2—:1s22s22p4 D.Ar:1s22s22p63s23p6
A.+1 B.+2 C.+3 D.-1
A.道爾頓 B.盧瑟福 C.湯姆生 D.波爾