1
18
1
H氢
Hydrogen1.008
2
- 碱金属
- 碱土金属
- 非金属
- 类金属
- 后过渡金属
- 过渡金属
- 卤素
- 惰性气体
- 镧系元素
- 放射元素
13
14
15
16
17
2
He氦
Helium4.003
3
Li锂
Lithium6.940
4
Be铍
Beryllium9.012
5
B硼
Boron10.810
6
C碳
Carbon12.011
7
N氮
Nitrogen14.007
8
O氧
Oxygen15.999
9
F氟
Fluorine18.998
10
Ne氖
Neon20.180
11
Na钠
Sodium22.990
12
Mg镁
Magnesium24.305
3
4
5
6
7
8
9
10
11
12
13
Al铝
Aluminium26.982
14
Si硅
Silicon28.085
15
P磷
Phosphorus30.974
16
S硫
Sulfur32.06
17
Cl氯
Chlorine35.45
18
Ar氩
Argon39.948
19
K钾
Potassium39.098
20
Ca钙
Calcium40.078
21
Sc钪
Scandium44.956
22
Ti钛
Titanium47.867
23
V钒
Vanadium50.942
24
Cr铬
Chromium51.996
25
Mn锰
Manganese54.938
26
Fe铁
Iron55.845
27
Co钴
Cobalt58.933
28
Ni镍
Nickel58.693
29
Cu铜
Copper63.546
30
Zn锌
Zinc65.38
31
Ga镓
Gallium69.723
32
Ge锗
Germanium72.63
33
As砷
Arsenic74.922
34
Se硒
Selenium78.971
35
Br溴
Bromine79.904
36
Kr氪
Krypton83.768
37
Rb铷
Rubidium84.468
38
Sr锶
Strontium87.620
39
Y钇
Yttrium88.906
40
Zr锆
Zirconium91.224
41
Nb铌
Niobium92.906
42
Mo钼
Molybdenum95.95
43
Tc锝
Technetium98.907
44
Ru钌
Ruthenium101.07
45
Rh铑
Rhodium102.906
46
Pd钯
Palladium106.42
47
Ag银
Silver107.868
48
Cd镉
Cadmium112.411
49
In铟
Indium114.818
50
Sn锡
Tin118.711
51
Sb锑
Antimony121.76
52
Te碲
Tellurium127.6
53
I碘
Iodine126.904
54
Xe氙
Xenon131.294
55
Cs铯
Caesium132.905
56
Ba钡
Barium137.328
57-71
镧系
Lanthanoids
72
Hf铪
Hafnium178.49
73
Ta钽
Tantalum180.948
74
W钨
Tungsten183.84
75
Re铼
Rhenium186.207
76
Os锇
Osmium190.23
77
Ir铱
Iridium192.217
78
Pt铂
Platinum195.085
79
Au金
Gold196.967
80
Hg汞
Mercury200.592
81
Tl铊
Thallium204.383
82
Pb铅
Lead207.2
83
Bi铋
Bismuth208.98
84
Po钋
Polonium(208.982)
85
At砹
Astatine209.987
86
Rn氡
Radon222.018
87
Fr钫
Francium223.02
88
Ra镭
Radium226.025
89-103
锕系
Actinoids
104
Rf鑪
Rutherfordium(261)
105
Db𨧀
Dubnium(262)
106
Sg𨭎
Seaborgium(266)
107
Bh𨨏
Bohrium(264)
108
Hs𨭆
Hassium(269)
109
Mt䥑
Meitnerium(268)
110
Ds鐽
Darmstadtium(269)
111
Rg錀
Roentgenium(272)
112
Cn
Copernicium(277)
113
Uut
Ununtrium?
114
Fl
Flerovium(289)
115
Uup
Ununpentium?
116
Lv
Livermorium(298)
117
Uus
Ununseptium?
118
Uuo
Ununoctium?
57
La镧
Lanthanum138.905
58
Ce铈
Cerium140.116
59
Pr镨
Praseodymium140.908
60
Nd钕
Neodymium144.242
61
Pm钷
Promethium(145)
62
Sm钐
Samarium150.36
63
Eu铕
Europium151.964
64
Gd钆
Gadolinium157.25
65
Tb铽
Terbium158.925
66
Dy镝
Dysprosium162.5
67
Ho钬
Holmium164.93
68
Er铒
Erbium167.259
69
Tm铥
Thulium168.934
70
Yb镱
Ytterbium173.045
71
Lu镥
Lutetium174.967
89
Ac锕
Actinium(227)
90
Th钍
Thorium232.038
91
Pa镤
Protactinium231.036
92
U铀
Uranium238.029
93
Np镎
Neptunium(237)
94
Pu钚
Plutonium(244)
95
Am镅
Americium(243)
96
Cm锔
Curium(247)
97
Bk锫
Berkelium(247)
98
Cf锎
Californium(251)
99
Es锿
Einsteinium(252)
100
Fm镄
Fermium(257)
101
Md钔
Mendelevium(258)
102
No锘
Nobelium(259)
103
Lr铹
Lawrencium(262)