Group Period

1

2

1

1

H

1.006

2

3

Li

6.94

4

Be

9.0122

3

11

Na

22.990

12

Mg

24.305

4

19

K

39.098

20

Ca

40.078

5

37

Rb

85.468

38

Sr

87.62

6

55

Cs

132.91

56

Ba

137.33

7

87

Fr

[223.02]

88

Ra

[226.03]

*

**

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

2

He

4.0026

5

B

10.81

6

C

12.011

7

N

14.007

8

O

15.999

9

F

18.998

10

Ne

20.180

13

Al

26.982

14

Si

28.085

15

P

30.974

16

S

32.06

17

Cl

35.45

18

Ar

39.938

21

Sc

44.956

22

Ti

47.867

23

V

50.942

24

Cr

51.996

25

Mn

54.938

26

Fe

55.845

27

Co

58.933

28

Ni

58.693

29

Cu

63.546

30

Zn

65.38

31

Ga

69.723

32

Ge

72.63

33

As

74.922

34

Se

78.96

35

Br

79.904

36

Kr

83.798

39

Y

88.906

40

Zr

91.224

41

Nb

92.906

42

Mo

95.96

43

Tc

[97.91]

44

Ru

101.07

45

Rh

102.91

46

Pd

106.42

47

Ag

107.87

48

Cd

112.41

49

In

114.82

50

Sn

118.71

51

Sb

121.76

52

Te

127.60

53

I

126.90

54

Xe

131.29

71

Lu

174.97

72

Hf

178.49

73

Ta

180.95

74

W

183.84

75

Re

186.21

76

Os

190.23

77

Ir

192.22

78

Pt

195.08

79

Au

196.97

80

Hg

200.59

81

Tl

204.38

82

Pb

207.2

83

Bi

208.98

84

Po

[208.98]

85

At

[209.99]

86

Rn

[222.02]

103

Lr

[262.11]

104

Rf

[265.12]

105

Db

[268.13]

106

Sg

[271.13]

107

Bh

[270]

108

Hs

[277.15]

109

Mt

[276.15]

110

Ds

[281.16]

111

Rg

[280.16]

112

Cn

[285.17]

113

Uut

[284.18]

114

Fl

[289.19]

115

Uup

[288.19]

116

Lv

[293]

117

Uus

[294]

118

Uuo

[294]

*Lanthanoids

*

57

La

138.91

58

Ce

140.12

59

Pr

140.91

60

Nd

144.24

61

Pm

[144.91]

62

Sm

150.36

63

Eu

151.96

64

Gd

157.25

65

Tb

158.93

66

Dy

162.50

67

Ho

164.93

68

Er

167.26

69

Tm

168.93

70

Yb

173.05

**Actinoids

**

89

Ac

[227.03]

90

Th

[232.04]

91

Pa

[231.04]

92

U

[238.03]

93

Np

[237.05]

94

Pu

[244.06]

95

Am

[243.06]

96

Cm

[247.07]

97

Bk

[247.07]

98

Cf

[251.08]

99

Es

[252.08]

100

Fm

[257.10]

101

Md

[258.10]

102

No

[259.10]