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Atomic Mass of all Elements 118

 The mass of an atom is known as its atomic mass (ma or m). Although the kilogram (symbol: kg) is the SI measure of mass, the unified atomic mass unit (symbol: Da) is frequently used to express atomic mass (u). An unbound carbon-12 atom in its ground state has a mass of 112 of a Da. Nearly all of an atom's mass is made up of its protons and neutrons, with only a small amount of the mass coming from its electrons and nuclear binding energy. As a result, the atomic mass expressed in daltons has a value that is very similar to the mass number.

 

 

Atomic Mass of all Elements

Atomic No

Name

Symbol

Atomic Mass

1

Hydrogen

H

1.008

2

Helium

He

4.2026

3

Lithium

Li

7

4

Beryllium

Be

9.0121

5

Boron

B

10.81

6

Carbon

C

12.011

7

Nitrogen

N

14.007

8

Oxygen

O

15.999

9

Fluorine

F

18.998

10

Neon

Ne

20.18

11

Sodium

Na

22.98

12

Magnesium

Mg

24.305

13

Aluminum

Al

26.981

14

Silicon

Si

28.085

15

Phosphorus

P

30.973

16

Sulfur

S

32.07

17

Chlorine

Cl

35.45

18

Argon

Ar

39.9

19

Potassium

K

39.098

20

Calcium

Ca

40.08

21

Scandium

Sc

44.955

22

Titanium

Ti

47.87

23

Vanadium

V

50.941

24

Chromium

Cr

51.996

25

Manganese

Mn

54.938

26

Iron

Fe

55.84

27

Cobalt

Co

58.933

28

Nickel

Ni

58.693

29

Copper

Cu

63.55

30

Zinc

Zn

65.4

31

Gallium

Ga

69.72

32

Germanium

Ge

72.63

33

Arsenic

As

74.921

34

Selenium

Se

78.97

35

Bromine

Br

79.9

36

Krypton

Kr

83.8

37

Rubidium

Rb

85.468

38

Strontium

Sr

87.6

39

Yttrium

Y

88.90

40

Zirconium

Zr

91.22

41

Niobium

Nb

92.906

42

Molybdenum

Mo

96

43

Technetium

Tc

96.906

44

Ruthenium

Ru

101.1

45

Rhodium

Rh

102.90

46

Palladium

Pd

106.4

47

Silver

Ag

107.868

48

Cadmium

Cd

112.41

49

Indium

In

114.82

50

Tin

Sn

118.71

51

Antimony

Sb

121.76

52

Tellurium

Te

127.6

53

Iodine

I

126.90

54

Xenon

Xe

131.29

55

Cesium

Cs

132.905

56

Barium

Ba

137.33

57

Lanthanum

La

138.90

58

Cerium

Ce

140.12

59

Praseodymium

Pr

140.907

60

Neodymium

Nd

144.24

61

Promethium

Pm

144.912

62

Samarium

Sm

150.4

63

Europium

Eu

151.96

64

Gadolinium

Gd

157.2

65

Terbium

Tb

158.925

66

Dysprosium

Dy

162.5

67

Holmium

Ho

164.93

68

Erbium

Er

167.26

69

Thulium

Tm

168.934

70

Ytterbium

Yb

173

71

Lutetium

Lu

174.967

72

Hafnium

Hf

178.49

73

Tantalum

Ta

180.947

74

Tungsten

W

183.8

75

Rhenium

Re

186.21

76

Osmium

Os

190.2

77

Iridium

Ir

192.22

78

Platinum

Pt

195.08

79

Gold

Au

196.96

80

Mercury

Hg

200.59

81

Thallium

Tl

204.383

82

Lead

Pb

207.2

83

Bismuth

Bi

208.98

84

Polonium

Po

208.98

85

Astatine

At

209.987

86

Radon

Rn

222.0175

87

Francium

Fr

223.0197

88

Radium

Ra

226.025

89

Actinium

Ac

227.027

90

Thorium

Th

232.038

91

Protactinium

Pa

231.03

92

Uranium

U

238.028

93

Neptunium

Np

237.048

94

Plutonium

Pu

244.06

95

Americium

Am

243.06

96

Curium

Cm

247.07

97

Berkelium

Bk

247.07

98

Californium

Cf

251.079

99

Einsteinium

Es

252.083

100

Fermium

Fm

257.095

101

Mendelevium

Md

258.098

102

Nobelium

No

259.101

103

Lawrencium

Lr

266.12

104

Rutherfordium

Rf

267.122

105

Dubnium

Db

268.126

106

Seaborgium

Sg

269.128

107

Bohrium

Bh

270.133

108

Hassium

Hs

269.134

109

Meitnerium

Mt

277.154

110

Darmstadtium

Ds

282.166

111

Roentgenium

Rg

282.169

112

Copernicium

Cn

286.179

113

Nihonium

Nh

286.182

114

Flerovium

Fl

290.192

115

Moscovium

Mc

290.196

116

Livermorium

Lv

293.205

117

Tennessine

Ts

294.211

118

Oganesson

Og

295.216

 

 

 

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