Li
V
Na
K
Rb
Cs
Fr
Be
Mg
Ca
Sr
Ba
Ra
Sc
Y
La
Ac
Ti
Zr
Hf
Rf
Nb
Ta
Db
Cr
Mo
W
Sg
Mn
Tc
Re
Bh
Ir
Os
Ce
Th
Pr
Pa
Nd
U
Pm
Np
Sm
Pu
Fe
Ru
Hs
Co
Rh
Mt
H
3
Lithium
6.941
11
Sodium
22.989 770
19
Potassium
39.0983
37
Rubidium
85.4678
55
Cesium
132.905 45
87
Francium
(223)
58
Cerium
140.116
90
Thorium
232.0381
59
Praseodymium
140.907 65
91
Protactinium
231.035 88
60
Neodymium
144.24
92
Uranium
238.0289
61
Promethium
(145)
93
Neptunium
(237)
62
Samarium
150.36
94
Plutonium
(244)
4
Beryllium
9.012 182
12
Magnesium
24.3050
20
Calcium
40.078
38
Strontium
87.62
56
Barium
137.327
88
Radium
(226)
21
Scandium
44.955 910
39
Yttrium
88.905 85
57
Lanthanum
138.9055
89
Actinium
(227)
22
Titanium
47.867
40
Zirconium
91.224
72
Hafnium
178.49
104
Rutherfordium
(261)
23
Vanadium
50.9415
41
Niobium
92.906 38
73
Tantalum
180.9479
105
Dubnium
(262)
24
Chromium
51.9961
42
Molybdenum
95.94
74
Tungsten
183.84
106
Seaborgium
(263)
25
Manganese
54.938 049
43
Technetium
(98)
75
Rhenium
186.207
107
Bohrium
(264)
26
Iron
55.845
44
Ruthenium
101.07
76
77
Osmium
190.23
108
Hassium
(265)†
27
Cobalt
58.933 200
45
Rhodium
102.905 50
Iridium
192.217
109
Meitnerium
(268)†
Group 3
Group 4
Group 5
Group 6
Group 7
Group 8
Group 9
Group 1
Group 2
1
2
3
4
5
6
7
Period6
C
Carbon
12.0107
Atomic number
Symbol
Name
Average atomic mass
† Estimated from currently available
IUPAC data.
* The systematic names and symbols
for elements greater than 109 will
be used until the approval of trivial
names by IUPAC.
1
Hydrogen
1.007 94
Key:
63
Eu
Europium
151.964
95
Am
Americium
(243)
64
Gd
Gadolinium
157.25
96
Cm
Curium
(247)
65
Tb
Terbium
158.925 34
97
Bk
Berkelium
(247)
66
Dy
Dysprosium
162.50
98
Cf
Californium
(251)
67
Holmium
164.930 32
99
Einsteinium
(252)
68
Erbium
167.26
100
Fermium
(257)
69
Thulium
168.934 21
101
Mendelevium
(258)
70
Ytterbium
173.04
102
Nobelium
(259)
71
Lutetium
174.967
103
Lawrencium
(262)
28
Ni
Nickel
58.6934
29
Cu
Copper
63.546
30
Zn
Zinc
65.39
31
Ga
Gallium
69.723
32
Ge
Germanium
72.61
33
As
Arsenic
74.921 60
34
Se
Selenium
78.96
35
Br
B