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This is a large version of the periodic table and contains the symbol, atomic number, and mean atomic mass value for the natural isotopic composition of each element. The periodic table of the chemical elements is a tabular method of displaying the chemical elements. Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869. Mendeleev intended the table to illustrate recurring ("periodic") trends in the properties of the elements. The layout of the table has been refined and extended over time, as new elements have been discovered, and new theoretical models have been developed to explain chemical behavior.[1]

The periodic table is now ubiquitous within the academic discipline of chemistry, providing an extremely useful framework to classify, systematize and compare all the many different forms of chemical behavior. The table has also found wide application in physics, biology, engineering, and industry. The current standard table contains 118 confirmed elements as of 2008-03-10, through element 118.

Contents

Table

Group → 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
↓ Period IA IIA IIIB IVB VB VIB VIIB VIIIB VIIIB VIIIB IB IIB IIIA IVA VA VIA VIIA VIIIA
1 Hydrogen
1
H

1.0079
Name of element
Atomic number
Chemical symbol

Relative atomic mass 

Helium
2
He

4.0026
2 Lithium
3
Li

6.941(2)
Beryllium
4
Be

9.0122
Boron
5
B

10.811(7)
Carbon
6
C

12.011
Nitrogen
7
N

14.0067
Oxygen
8
O

15.9994
Fluorine
9
F

18.998
Neon
10
Ne

20.180
3 Sodium
11
Na

22.990
Magnesium
12
Mg

24.305
Aluminium
13
Al

26.982
Silicon
14
Si

28.086
Phosphorus
15
P

30.974
Sulfur
16
S

32.066(6)
Chlorine
17
Cl

35.453
Argon
18
Ar

39.948(1)
4 Potassium
19
K

39.098
Calcium
20
Ca

40.078(4)
Scandium
21
Sc

44.956
Titanium
22
Ti

47.867(1)
Vanadium
23
V

50.942(1)
Chromium
24
Cr

51.996
Manganese
25
Mn

54.938
Iron
26
Fe

55.845(2)
Cobalt
27
Co

58.933
Nickel
28
Ni

58.693
Copper
29
Cu

63.546(3)
Zinc
30
Zn

65.39(2)
Gallium
31
Ga

69.723(1)
Germanium
32
Ge

72.61(2)
Arsenic
33
As

74.922
Selenium
34
Se

78.96(3)
Bromine
35
Br

79.904(1)
Krypton
36
Kr

83.80(1)
5 Rubidium
37
Rb

85.468
Strontium
38
Sr

87.62(1)
Yttrium
39
Y

88.906
Zirconium
40
Zr

91.224(2)
Niobium
41
Nb

92.906
Molybdenum
42
Mo

95.94(1)
Technetium
43
Tc

[97.907]
Ruthenium
44
Ru

101.07(2)
Rhodium
45
Rh

102.906
Palladium
46
Pd

106.42(1)
Silver
47
Ag

107.868
Cadmium
48
Cd

112.411(8)
Indium
49
In

114.818(3)
Tin
50
Sn

118.710(7)
Antimony
51
Sb

121.760(1)
Tellurium
52
Te

127.60(3)
Iodine
53
I

126.904
Xenon
54
Xe

131.29(2)
6 Caesium
55
Cs

132.905
Barium
56
Ba

137.327(7)
Lanthanides
57-71
*

Hafnium
72
Hf

178.49(2)
Tantalum
73
Ta

180.948
Tungsten
74
W

183.84(1)
Rhenium
75
Re

186.207(1)
Osmium
76
Os

190.23(3)
Iridium
77
Ir

192.217(3)
Platinum
78
Pt

195.084(9)
Gold
79
Au

196.967
Mercury
80
Hg

200.59(2)
Thallium
81
Tl

204.383
Lead
82
Pb

207.2(1)
Bismuth
83
Bi

208.980
Polonium
84
Po

[208.982]
Astatine
85
At

[209.987]
Radon
86
Rn

[222.018]
7 Francium
87
Fr

[223.020]
Radium
88
Ra

[226.0254]
Actinides
89-103
**

Rutherfordium
104
Rf

[263.113]
Dubnium
105
Db

[262.114]
Seaborgium
106
Sg

[266.122]
Bohrium
107
Bh

[264.1247]
Hassium
108
Hs

[269.134]
Meitnerium
109
Mt

[268.139]
Darmstadtium
110
Ds

[272.146]
Roentgenium
111
Rg

[272.154]
Copernicium
112
Cn

[277]
Ununtrium
113
Uut

[284]
Ununquadium
114
Uuq

[289]
Ununpentium
115
Uup

[288]
Ununhexium
116
Uuh

[292]
Ununseptium
117
Uus

[294]
Ununoctium
118
Uuo

[294]

Lanthanides   Lanthanum
57
La

138.905
Cerium
58
Ce

140.116(1)
Praseodymium
59
Pr

140.908
Neodymium
60
Nd

144.242(3)
Promethium
61
Pm

[144.913]
Samarium
62
Sm

150.36(2)
Europium
63
Eu

151.964(1)
Gadolinium
64
Gd

157.25(3)
Terbium
65
Tb

158.925
Dysprosium
66
Dy

162.500(1)
Holmium
67
Ho

164.930
Erbium
68
Er

167.259(3)
Thulium
69
Tm

168.934
Ytterbium
70
Yb

173.04(3)
Lutetium
71
Lu

174.967(1)
** Actinides   Actinium
89
Ac

[227.027]
Thorium
90
Th

232.038
Protactinium
91
Pa

231.036
Uranium
92
U

238.029
Neptunium
93
Np

[237.048]
Plutonium
94
Pu

[244.064]
Americium
95
Am

[243.061]
Curium
96
Cm

[247.070]
Berkelium
97
Bk

[247.070]
Californium
98
Cf

[251.080]
Einsteinium
99
Es

[252.083]
Fermium
100
Fm

[257.095]
Mendelevium
101
Md

[258.098]
Nobelium
102
No

[259.101]
Lawrencium
103
Lr

[262.110]
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Legend

State at standard temperature and pressure (0°C and 1 atm)
Gases Liquids Solids Unknown
Natural occurrence
Undiscovered Synthetic From decay Primordial

References

Notes


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