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Alkali metal
Alkaline earth
Transition metal
Post-transition
Metalloid
Nonmetal
Noble gas
Lanthanide
Actinide
Unknown
1
H
Hydrogen
1.008
2
He
Helium
4.003
3
Li
Lithium
6.94
4
Be
Beryllium
9.012
5
B
Boron
10.81
6
C
Carbon
12.011
7
N
Nitrogen
14.007
8
O
Oxygen
15.999
9
F
Fluorine
18.998
10
Ne
Neon
20.18
11
Na
Sodium
22.99
12
Mg
Magnesium
24.305
13
Al
Aluminium
26.982
14
Si
Silicon
28.085
15
P
Phosphorus
30.974
16
S
Sulfur
32.06
17
Cl
Chlorine
35.45
18
Ar
Argon
39.948
19
K
Potassium
39.098
20
Ca
Calcium
40.078
21
Sc
Scandium
44.956
22
Ti
Titanium
47.867
23
V
Vanadium
50.942
24
Cr
Chromium
51.996
25
Mn
Manganese
54.938
26
Fe
Iron
55.845
27
Co
Cobalt
58.933
28
Ni
Nickel
58.693
29
Cu
Copper
63.546
30
Zn
Zinc
65.382
31
Ga
Gallium
69.723
32
Ge
Germanium
72.631
33
As
Arsenic
74.922
34
Se
Selenium
78.972
35
Br
Bromine
79.904
36
Kr
Krypton
83.798
37
Rb
Rubidium
85.468
38
Sr
Strontium
87.621
39
Y
Yttrium
88.906
40
Zr
Zirconium
91.224
41
Nb
Niobium
92.906
42
Mo
Molybdenum
95.951
43
Tc
Technetium
98
44
Ru
Ruthenium
101.072
45
Rh
Rhodium
102.906
46
Pd
Palladium
106.421
47
Ag
Silver
107.868
48
Cd
Cadmium
112.414
49
In
Indium
114.818
50
Sn
Tin
118.711
51
Sb
Antimony
121.76
52
Te
Tellurium
127.603
53
I
Iodine
126.904
54
Xe
Xenon
131.294
55
Cs
Cesium
132.905
56
Ba
Barium
137.328
57
La
Lanthanum
138.905
58
Ce
Cerium
140.116
59
Pr
Praseodymium
140.908
60
Nd
Neodymium
144.242
61
Pm
Promethium
145
62
Sm
Samarium
150.362
63
Eu
Europium
151.964
64
Gd
Gadolinium
157.253
65
Tb
Terbium
158.925
66
Dy
Dysprosium
162.5
67
Ho
Holmium
164.93
68
Er
Erbium
167.259
69
Tm
Thulium
168.934
70
Yb
Ytterbium
173.045
71
Lu
Lutetium
174.967
72
Hf
Hafnium
178.492
73
Ta
Tantalum
180.948
74
W
Tungsten
183.841
75
Re
Rhenium
186.207
76
Os
Osmium
190.233
77
Ir
Iridium
192.217
78
Pt
Platinum
195.085
79
Au
Gold
196.967
80
Hg
Mercury
200.592
81
Tl
Thallium
204.38
82
Pb
Lead
207.21
83
Bi
Bismuth
208.98
84
Po
Polonium
209
85
At
Astatine
210
86
Rn
Radon
222
87
Fr
Francium
223
88
Ra
Radium
226
89
Ac
Actinium
227
90
Th
Thorium
232.038
91
Pa
Protactinium
231.036
92
U
Uranium
238.029
93
Np
Neptunium
237
94
Pu
Plutonium
244
95
Am
Americium
243
96
Cm
Curium
247
97
Bk
Berkelium
247
98
Cf
Californium
251
99
Es
Einsteinium
252
100
Fm
Fermium
257
101
Md
Mendelevium
258
102
No
Nobelium
259
103
Lr
Lawrencium
266
104
Rf
Rutherfordium
267
105
Db
Dubnium
268
106
Sg
Seaborgium
269
107
Bh
Bohrium
270
108
Hs
Hassium
269
109
Mt
Meitnerium
278
110
Ds
Darmstadtium
281
111
Rg
Roentgenium
282
112
Cn
Copernicium
285
113
Nh
Nihonium
286
114
Fl
Flerovium
289
115
Mc
Moscovium
289
116
Lv
Livermorium
293
117
Ts
Tennessine
294
118
Og
Oganesson
294
57–71
89–103
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