Element

Symbol

Atomic Number

Atomic Mass

Element

Symbol

Atomic Number

Atomic Mass

Actinium

Ac

89

(227)

Meitnerium

Mt

109

(266)

Aluminum

Al

13

26.98

Mendelevium

Md

101

(256)

Americium

Am

95

(243)

Mercury

Hg

80

200.6

Antimony

Sb

51

121.8

Molybdenum

Mo

42

95.94

Argon

Ar

18

39.95

Neodymium

Nd

60

144.2

Arsenic

As

33

74.92

Neon

Ne

10

20.18

Astatine

At

85

(210)

Neptunium

Np

93

(237)

Barium

Ba

56

137.3

Nickel

Ni

28

58.69

Berkelium

Bk

97

(247)

Niobium

Nb

41

92.91

Beryllium

Be

4

9.012

Nitrogen

N

7

14.01

Bismuth

Bi

83

209.0

Nobelium

No

102

(253)

Bohrium

Bh

107

(262)

Osmium

Os

76

190.2

Boron

B

5

10.81

Oxygen

O

8

16.00

Bromine

Br

35

79.90

Palladium

Pd

46

106.4

Cadmium

Cd

48

112.4

Phosphorus

P

15

30.97

Calcium

Ca

20

40.08

Platinum

Pt

78

195.1

Californium

Cf

98

(249)

Plutonium

Pu

94

(242)

Carbon

C

6

12.01

Polonium

Po

84

(210)

Cerium

Ce

58

140.1

Potassium

K

19

39.10

Cesium

Cs

55

132.9

Praseodymium

Pr

59

140.9

Chlorine

Cl

17

35.45

Promethium

Pm

61

(147)

Chromium

Cr

24

52.00

Protactinium

Pa

91

(231)

Cobalt

Co

27

58.93

Radium

Ra

88

(226)

Copper

Cu

29

63.55

Radon

Rn

86

(222)

Curium

Cm

96

(247)

Rhenium

Re

75

186.2

Darmstadtium

Ds

110

(281)

Rhodium

Rh

45

102.9

Dubnium

Db

105

(260)

Rubidium

Rb

37

85.47

Dysprosium

Dy

66

162.5

Ruthenium

Ru

44

101.1

Einsteinium

Es

99

(254)

Rutherfordium

Rf

104

(257)

Erbium

Er

68

167.3

Samarium

Sm

62

150.4

Europium

Eu

63

152.0

Scandium

Sc

21

44.96

Fermium

Fm

100

(253)

Seaborgium

Sg

106

(263)

Fluorine

F

9

19.00

Selenium

Se

34

78.96

Francium

Fr

87

(233)

Silicon

Si

14

28.09

Gadolinium

Gd

64

157.3

Silver

Ag

47

107.9

Gallium

Ga

31

69.72

Sodium

Na

11

22.99

Germanium

Ge

32

72.59

Strontium

Sr

38

87.62

Gold

Au

79

197.0

Sulfur

S

16

32.07

Hafnium

Hf

72

178.5

Tantalum

Ta

73

180.9

Hassium

Hs

108

(265)

Technetium

Tc

43

(99)

Helium

He

2

4.003

Tellurium

Te

52

127.6

Holmium

Ho

67

165.9

Terbium

Tb

65

158.9

Hydrogen

H

1

1.008

Thallium

Tl

81

204.4

Indium

In

49

114.8

Thorium

Th

90

232.0

Iodine

I

53

126.9

Thulium

Tm

69

168.9

Iridium

Ir

77

192.2

Tin

Sn

50

118.7

Iron

Fe

26

55.85

Titanium

Ti

22

47.88

Krypton

Kr

36

83.80

Tungsten

W

74

183.9

Lanthanum

La

57

138.9

Uranium

U

92

238.0

Lawrencium

Lr

103

(257)

Vanadium

V

23

50.94

Lead

Pb

82

207.2

Xenon

Xe

54

131.3

Lithium

Li

3

6.941

Ytterbium

Yb

70

173.0

Lutetium

Lu

71

175.0

Yttrium

Y

39

88.91

Magnesium

Mg

12

24.31

Zinc

Zn

30

65.39

Manganese

Mn

25

54.94

Zirconium

Zr

40

91.22