3Li
10Ne
11Na
18Ar
19K
36Kr
37Rb
54Xe
55Cs
86Rn
1s22s1
1s22s22p6
1s22s22p63s1
1s22s22p63s23p6
[Ar]4s1
[Ar]3d104s24p6
[Kr]5s1
[Kr] 4d105s25p6
[Xe]6s1
87Fr
118X
[Xe] 4f145d106s26p6
[Rn] 5f146d107s27p6
1H
2He
1s1
1s2
[Rn]7s1