Encyclopedia of Biology

377

APPENDIX V

1

1.008

H

1

1.008

H

3

6.941

Li

11

22.99

Na

19

39.10

K

37

85.47

Rb

55

132.9

Cs

87

(223)

Fr

4

9.012

Be

12

24.31

Mg

20

40.08

Ca

38

87.62

Sr

56

137.3

Ba

88

(226)

Ra

58

140.1

Ce

90

232.0

Th

21

44.96

Sc

39

88.91

Y

57–71*

89–103‡

57

138.9

La

89

(227)

Ac

59

140.9

Pr

91

231.0

Pa

22

47.88

Ti

40

91.22

Zr

72

178.5

Hf

104

(261)

Rf

60

144.2

Nd

92

238.0

U

23

50.94

V

41

92.91

Nb

73

180.9

Ta

105

(262)

Db

61

(145)

Pm

93

(237)

Np

24

52.00

Cr

42

95.94

Mo

74

183.9

W

106

(263)

Sg

62

150.4

Sm

94

(244)

Pu

25

54.94

Mn

43

(98)

Tc

75

186.2

Re

107

(262)

Bh

63

152.0

Eu

95

(243)

Am

26

55.85

Fe

44

101.1

Ru

76

190.2

Os

108

(265)

Hs

64

157.3

Gd

96

(247)

Cm

27

58.93

Co

45

102.9

Rh

77

192.2

Ir

109

(266)

Mt

110

(271)

Ds

65

158.9

Tb

97

(247)

Bk

28

58.69

Ni

46

106.4

Pd

78

195.1

Pt

66

162.5

Dy

98

(251)

Cf

29

63.55

Cu

47

107.9

Ag

79

197.0

Au

67

164.9

Ho

99

(252)

Es

30

65.39

Zn

48

112.4

Cd

80

200.6

Hg

5

10.81

B

13

26.98

Al

31

69.72

Ga

49

114.8

In

81

204.4

Tl

6

12.01

C

14

28.09

Si

32

72.59

Ge

50

118.7

Sn

82

207.2

Pb

7

14.01

N

15

30.97

P

33

74.92

As

51

121.8

Sb

83

209.0

Bi

68

167.3

Er

8

16.00

O

16

32.07

S

34

78.96

Se

52

127.6

Te

84

(210)

Po

69

168.9

Tm

9

19.00

F

17

35.45

Cl

35

79.90

Br

53

126.9

I

85

(210)

At

70

173.0

Yb

2

4.003

He

10

20.18

Ne

18

39.95

Ar

36

83.80

Kr

54

131.3

Xe

86

(222)

Rn

71

175.0

Lu

100

(257)

Fm

101

(258)

Md

102

(259)

No

103

(260)

Lr

atomic number

atomic weight

symbol

*lanthanide

series

‡actinide

series

Numbers in parentheses are

atomic mass numbers of radioactive isotopes.

Periodic Table of the Elements