Periodic Table of the Elements

Period

Periodic Table of the Elements

1

18

+1

¨C1

1.00794

H

1

1

4.00260

KEY

12.011

Atomic Mass

1

C

Symbol

Group

2

1

+1 9.01218

6.941

Li

2

3

2-1

Be

Group

+1 24.305

K

4

19

2-8-8-1

85.4678

Rb

37

2-8-18-8-1

132.905

2-8-18-18-8-1

(223)

7

87

Fr

-18-32-18-8-1

B

Group

+1 40.08

+2 44.9559

Ca Sc

20

2-8-8-2

+1 87.62

38

Sr

2-8-18-8-2

+1 137.33

56

2-8-18-18-8-2

+1 226.025

21

2-8-9-2

+2 88.9059

39

Y

2-8-18-9-2

+2 138.906

57

2-8-18-18-9-2

+2 227.028

Ra Ac

88

-18-32-18-8-2

4

89

-18-32-18-9-2

+3 47.88

Ti

22

2-8-10-2

+3 91.224

40

Zr

2-8-18-10-2

+3 178.49

72

Hf

**18-32-10-2

+3 (261)

5

+2 51.996

+3

+4

+5

+2 50.9415

+3

+4

V

23

7

6

24

2-8-11-2

+3 95.94

+5

26

25

2-8-13-2

+3 (98)

+6

Nb Mo Tc

41

2-8-18-12-1

+4 180.948

42

2-8-18-13-1

+5 183.85

Ta

73

74

+2 55.847

+3

+4

+7

Cr Mn Fe

2-8-13-1

+4 92.9064

+2 54.9380

+3

+6

W

43

2-8-18-14-1

+6 186.207

2-8-14-2

+4 101.07

+6

+7

+2 58.9332

+3

Co

27

2-8-15-2

+3 102.906

10

+2 58.69

+3

28

Ni

2-8-16-2

11

+2 63.546

+3

+1 65.39

+2

+2 107.868

+4

2-8-18-15-1

+4 190.2

+6

+7

76

46

45

2-8-18-16-1

+3 192.22

+4

77

Ir

47

2-8-18-18

2-8-18-18-1

+3 195.08

+4

78

Pt

Al

+1 112.41

31

2-8-18-3

+2 114.82

+2 196.967

+4

+1 200.59

+3

Au Hg

79

49

+1 204.383

+2

80

-18-32-15-2

-18-32-17-1

-18-32-18-1

-18-32-18-2

(262)

(263)

(264)

(265)

(268)

(269)

(272)

(277)

In

2-8-18-18-3

2-8-18-18-2

-18-32-14-2

108

109

Si

+3 72.59

48

-18-32-13-2

107

14

+2 69.72

2-8-18-2

-18-32-12-2

106

+3 28.0855

2-8-4

30

-18-32-11-2

105

N

7

2-5

2-8-3

81

Tl

-18-32-18-3

¨C4 30.97376

+2

+4

P

15

2-8-5

¨C4 74.9216

+2

+4

111

32

33

2-8-18-4

+3 118.71

2-8-18-5

+2 121.75

+4

Sn Sb

51

50

2-8-18-18-5

2-8-18-18-4

+1 207.2

+3

Pb

+2 208.980

+4

82

83

-18-32-18-4

Bi

-18-32-18-5

17

18

¨C3 15.9994

¨C2

¨C1

+1

+2

+3

+4

+5 2-6

¨C2 18.998403

2-7

2-8

¨C3 32.06

+3

+5

¨C2 35.453

+4

+6

¨C1 39.948

+1

+3

+5

+7

O

8

16

S

F

9

Cl

17

¨C1 20.179

Ne

10

18

2-8-6

2-8-7

2-8-8

¨C2 79.904

+4

+6

¨C1 83.80

+1

+5

2-8-18-6

¨C3 127.60

+3

+5

52

Te

2-8-18-18-6

+3 (209)

+5

Po

84

-18-32-18-6

35

Br

2-8-18-7

¨C2 126.905

+4

+6

l

53

2-8-18-18-7

+2 (210)

+4

85

36

0

Ar

¨C3 78.96

+3

+5

34

0

Kr

0

+2

2-8-18-8

¨C1 131.29

+1

+5

+7

Xe

0

+2

+4

+6

54

2-8-18-18-8

(222)

0

At Rn

-18-32-18-7

86

-18-32-18-8

(285)

Rf Db Sg Bh Hs Mt Uun Uuu Uub

104

¨C4 14.0067

+2

+4

Cu Zn Ga Ge As Se

29

2-8-18-1

+3 106.42

12

Ru Rh Pd Ag Cd

44

Re Os

75

9

8

13

C

6

16

15

2-4

26.98154

Cs Ba La

55

+3 12.0111

10.81

+2

3

14

13

Note: Mass numbers in parentheses

are mass numbers of the most

stable or common isotope.

2-4

He

2

Relative atomic masses are based

on 12C = 12.000

2-3

2-8-2

39.0983

Uuq

114

112

*The systematic names and symbols for elements of atomic numbers above 109

will be used until the approval of trivial names by IUPAC.

**Denotes the presence of (2-8-)

for elements 72 and above

140.12

Ce

58

232.038

+3 140.908

+4

59

+4 231.036

91

+3 144.24

+3 (145)

+3 150.36

+2 151.96

+3

+2 157.25

+3

+3 158.925

+3 162.50

+3 164.930

Pr Nd Pm Sm Eu Gd Tb Dy Ho

Th Pa

90

8

2

5

12

2-8-1

6

Electron Configuration

Na Mg

11

5

+2

Selected Oxidation States

2-2

22.98977

3

4

6

Atomic Number

¨C4

+2

+4

0

60

61

+4 238.029

+5

+3 237.048

+4

+5

+6

92

93

U

62

+3 (244)

+4

+5

+6

63

+3 (243)

+4

+5

+6

64

+3 (247)

+4

+5

+6

65

+3 (247)

Np Pu Am Cm Bk

94

Reference Tables for Physical Setting/ CHEMISTRY

95

96

97

66

67

+3 (251)

+4

98

Cf

+3 (252)

99

+3 167.26

68

+3 168.934

+3 173.04

+3

Er Tm Yb Lu

(257)

69

70

71

(258)

(259)

(260)

Es Fm Md No

Reference Tables for Physical Setting/ CHEMISTRY

+2 174.967

+3

100

101

102

Lr

103

9

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