He
氦
4,0026
F
氟
18,998
Ne
氖
20,180
Cl
氯
35,45
Ar
氩
39,948
Br
溴
79,904
Kr
氪
83,798(2)
I
碘
126,90
Xe
氙
131,29
* *
At
砹
[210]
Rn
氡
[222]
* *
Ts
鿬
[294]
Og
鿫
[294]
La
镧
138,91
Ce
铈
140,12
Pr
镨
140,91
Nd
钕
144,24
Pm
钷
[145]
Sm
钐
150,36(2)
Eu
铕
151,96
Gd
钆
157,25(3)
Tb
铽
158,93
Dy
镝
162,50
Ho
钬
164,93
Er
铒
167,26
Tm
铥
168,93
Yb
镱
173,05
Lu
镥
174,97
Acs
锕
[227]
Th
钍
232,04
Pa
镤
231,04
U
铀
238,03
Np
镎
[237]
Pu
钚
[244]
Am
镅
[243]
Cm
锔
[247]
Bk
锫
[247]
Cf
锎
[251]
Es
锿
[252]
Fm
镄
[257]
MD
钔
[258]
No
锘
[259]
Lr
铹
[262]