2
He
Helium
4.0026
1s2
10
Ne
Neon
20.18
[He] 2s22p6
18
Ar
Argon
39.948
[Ne] 3s23p6
36
Kr
Krypton
83.798
[Ar] 3d104s24p6
54
Xe
Xenon
131.29
[Kr] 4d105s25p6
57
La
Lanthanum
138.91
[Xe] 5d16s2
58
Ce
Cerium
140.12
[Xe] 4f15d16s2
59
Pr
Praseodymium
140.91
[Xe] 4f36s2
60
Nd
Neodymium
144.24
[Xe] 4f46s2
61
Pm
Promethium
144.24
[Xe] 4f56s2
62
Sm
Samarium
150.36
[Xe] 4f66s2
63
Eu
Europium
151.96
[Xe] 4f76s2
64
Gd
Gadolinium
157.25
[Xe] 4f75d16s2
65
Tb
Terbium
158.93
[Xe] 4f96s2
66
Dy
Dysprosium
162.5
[Xe] 4f106s2
67
Ho
Holmium
164.93
[Xe] 4f116s2
68
Er
Erbium
167.26
[Xe] 4f126s2
69
Tm
Thulium
168.93
[Xe] 4f136s2
70
Yb
Ytterbium
173.05
[Xe] 4f146s2
71
Lu
Lutetium
174.97
[Xe] 4f145d16s2
86
Rn
Radon
(222)
[Xe] 4f145d106s26p6
89
Ac
Actinium
(227)
[Rn] 6d17s2
90
Th
Thorium
232.04
[Rn] 6d27s2
91
Pa
Protactinium
231.04
[Rn] 5f26d17s2
92
U
Uranium
238.03
[Rn] 5f36d17s2
93
Np
Neptunium
(237)
[Rn] 5f46d17s2
94
Pu
Plutonium
(244)
[Rn] 5f67s2
95
Am
Americium
(243)
[Rn] 5f77s2
96
Cm
Curium
(247)
[Rn] 5f76d17s2
97
Bk
Berkelium
(247)
[Rn] 5f9>7s2
98
Cf
Californium
(251)
[Rn] 5f107s2
99
Es
Einsteinium
(252)
[Rn] 5f117s2
100
Fm
Fermium
(257)
[Rn] 5f127s2
101
Md
Mendelevium
(258)
[Rn] 5f137s2
102
No
Nobelium
(259)
[Rn] 5f147s2
103
Lr
Lawrencium
(266)
[Rn] 5f147s27p1
109
Mt
Meitnerium
(278)
[Rn] 5f146d77s2
110
Ds
Darmstadtium
(281)
[Rn] 5f146d87s2
111
Rg
Roentgenium
(282)
[Rn] 5f146d97s2
113
Nh
Nihonium
(286)
[Rn] 5f146d107s27p1
115
Mc
Moscovium
(290)
[Rn] 5f146d107s27p3
116
Lv
Livermorium
(293)
[Rn] 5f146d107s27p4
117
Ts
Tennessine
(294)
[Rn] 5f146d107s27p5
118
Og
Oganesson
(294)
[Rn] 5f146d107s27p6
57-71
89-103