Chemical Elements

1

H

hydrogen

1.00794(4)

gas

0.0000899

1766

2

He

helium

4.002602(2)

gas

0.0001785

1868

3

Li

lithium

6.941(2)

solid

0.535

1817

4

Be

beryllium

9.012182(3)

solid

1.848

1798

5

B

boron

10.811(7)

solid

2.46

1807

6

C

carbon

12.0107(8)

solid

2.26

Ancient

7

N

nitrogen

14.0067(2)

gas

0.001251

1772

8

O

oxygen

15.9994(3)

gas

0.001429

1774

9

F

fluorine

18.9984032(5)

gas

0.001696

1670

10

Ne

neon

20.1797(6)

gas

0.0009

1898

11

Na

sodium

22.98976928(2)

solid

0.968

1807

12

Mg

magnesium

24.3050(6)

solid

1.738

1808

13

Al

aluminum

26.9815386(8)

solid

2.7

Ancient

14

Si

silicon

28.0855(3)

solid

2.33

1854

15

P

phosphorus

30.973762(2)

solid

1.823

1669

16

S

sulfur

32.065(5)

solid

1.96

Ancient

17

Cl

chlorine

35.453(2)

gas

0.003214

1774

18

Ar

argon

39.948(1)

gas

0.001784

1894

19

K

potassium

39.0983(1)

solid

0.856

1807

20

Ca

calcium

40.078(4)

solid

1.55

Ancient

21

Sc

scandium

44.955912(6)

solid

2.985

1876

22

Ti

titanium

47.867(1)

solid

4.507

1791

23

V

vanadium

50.9415(1)

solid

6.11

1803

24

Cr

chromium

51.9961(6)

solid

7.14

Ancient

25

Mn

manganese

54.938045(5)

solid

7.47

1774

26

Fe

iron

55.845(2)

solid

7.874

Ancient

27

Co

cobalt

58.933195(5)

solid

8.9

Ancient

28

Ni

nickel

58.6934(4)

solid

8.908

1751

29

Cu

copper

63.546(3)

solid

8.92

Ancient

30

Zn

zinc

65.38(2)

solid

7.14

1746

31

Ga

gallium

69.723(1)

solid

5.904

1875

32

Ge

germanium

72.64(1)

solid

5.323

1886

33

As

arsenic

74.92160(2)

solid

5.727

Ancient

34

Se

selenium

78.96(3)

solid

4.819

1817

35

Br

bromine

79.904(1)

liquid

3.12

1826

36

Kr

krypton

83.798(2)

gas

0.00375

1898

37

Rb

rubidium

85.4678(3)

solid

1.532

1861

38

Sr

strontium

87.62(1)

solid

2.63

1790

39

Y

yttrium

88.90585(2)

solid

4.472

1794

40

Zr

zirconium

91.224(2)

solid

6.511

1789

41

Nb

niobium

92.90638(2)

solid

8.57

1801

42

Mo

molybdenum

95.96(2)

solid

10.28

1778

43

Tc

technetium

[98]

solid

11.5

1937

44

Ru

ruthenium

101.07(2)

solid

12.37

1827

45

Rh

rhodium

102.90550(2)

solid

12.45

1803

46

Pd

palladium

106.42(1)

solid

12.023

1803

47

Ag

silver

107.8682(2)

solid

10.49

Ancient

48

Cd

cadmium

112.411(8)

solid

8.65

1817

49

In

indium

114.818(3)

solid

7.31

1863

50

Sn

tin

118.710(7)

solid

7.31

Ancient

51

Sb

antimony

121.760(1)

solid

6.697

Ancient

52

Te

tellurium

127.60(3)

solid

6.24

1782

53

I

iodine

126.90447(3)

solid

4.94

1811

54

Xe

xenon

131.293(6)

gas

0.0059

1898

55

Cs

cesium

132.9054519(2)

solid

1.879

1860

56

Ba

barium

137.327(7)

solid

3.51

1808

57

La

lanthanum

138.90547(7)

solid

6.146

1839

58

Ce

cerium

140.116(1)

solid

6.689

1803

59

Pr

praseodymium

140.90765(2)

solid

6.64

1885

60

Nd

neodymium

144.242(3)

solid

7.01

1885

61

Pm

promethium

[145]

solid

7.264

1947

62

Sm

samarium

150.36(2)

solid

7.353

1853

63

Eu

europium

151.964(1)

solid

5.244

1901

64

Gd

gadolinium

157.25(3)

solid

7.901

1880

65

Tb

terbium

158.92535(2)

solid

8.219

1843

66

Dy

dysprosium

162.500(1)

solid

8.551

1886

67

Ho

holmium

164.93032(2)

solid

8.795

1878

68

Er

erbium

167.259(3)

solid

9.066

1842

69

Tm

thulium

168.93421(2)

solid

9.321

1879

70

Yb

ytterbium

173.054(5)

solid

6.57

1878

71

Lu

lutetium

174.9668(1)

solid

9.841

1907

72

Hf

hafnium

178.49(2)

solid

13.31

1923

73

Ta

tantalum

180.94788(2)

solid

16.65

1802

74

W

tungsten

183.84(1)

solid

19.25

1783

75

Re

rhenium

186.207(1)

solid

21.02

1925

76

Os

osmium

190.23(3)

solid

22.61

1803

77

Ir

iridium

192.217(3)

solid

22.65

1803

78

Pt

platinum

195.084(9)

solid

21.09

Ancient

79

Au

gold

196.966569(4)

solid

19.3

Ancient

80

Hg

mercury

200.59(2)

liquid

13.534

Ancient

81

Tl

thallium

204.3833(2)

solid

11.85

1861

82

Pb

lead

207.2(1)

solid

11.34

Ancient

83

Bi

bismuth

208.98040(1)

solid

9.78

Ancient

84

Po

polonium

[209]

solid

9.196

1898

85

At

astatine

[210]

solid

(unknown)

1940

86

Rn

radon

[222]

gas

0.00973

1900

87

Fr

francium

[223]

solid

(unknown)

1939

88

Ra

radium

[226]

solid

5

1898

89

Ac

actinium

[227]

solid

10.07

1899

90

Th

thorium

232.03806(2)

solid

11.724

1828

91

Pa

protactinium

231.03588(2)

solid

15.37

1913

92

U

uranium

238.02891(3)

solid

19.05

1789

93

Np

neptunium

[237]

solid

20.45

1940

94

Pu

plutonium

[244]

solid

19.816

1940

95

Am

americium

[243]

solid

(unknown)

1944

96

Cm

curium

[247]

solid

13.51

1944

97

Bk

berkelium

[247]

solid

14.78

1949

98

Cf

californium

[251]

solid

15.1

1950

99

Es

einsteinium

[252]

solid

(unknown)

1952

100

Fm

fermium

[257]

(unknown)

(unknown)

1952

101

Md

mendelevium

[258]

(unknown)

(unknown)

1955

102

No

nobelium

[259]

(unknown)

(unknown)

1957

103

Lr

lawrencium

[262]

(unknown)

(unknown)

1961

104

Rf

rutherfordium

[267]

(unknown)

(unknown)

1969

105

Db

dubnium

[268]

(unknown)

(unknown)

1967

106

Sg

seaborgium

[271]

(unknown)

(unknown)

1974

107

Bh

bohrium

[272]

(unknown)

(unknown)

1976

108

Hs

hassium

[270]

(unknown)

(unknown)

1984

109

Mt

meitnerium

[276]

(unknown)

(unknown)

1982

110

Ds

darmstadtium

[281]

(unknown)

(unknown)

1994

111

Rg

roentgenium

[280]

(unknown)

(unknown)

1994

112

Cn

copernicium

[285]

(unknown)

(unknown)

1996

113

Nh

nihonium

[284]

(unknown)

(unknown)

2003

114

Fl

flerovium

[289]

(unknown)

(unknown)

1998

115

Mc

moscovium

[288]

(unknown)

(unknown)

2003

116

Lv

livermorium

[293]

(unknown)

(unknown)

2000

117

Ts

tennessine

[294]

(unknown)

(unknown)

2010

118

Og

oganesson

[294]

(unknown)

(unknown)

2002