U.S. National Chemistry Olympiad

Accessible Periodic Table of Elements

Independence Science Periodic Table of the Elements

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The Periodic Table of Elements. Each entry contains the atomic number, chemical symbol, and atomic mass to two decimal places on elements where data is available. Undefined cells contain a space.
Row 9 is blank, and the content in the last two rows begins in column 3. The column headings announced when navigating the table do not apply to the last three rows.
1
1A

2
2A

3
3B

4
4B

5
5B

6
6B

7
7B

8
8B

9
8B

10
8B

11
1B

12
2B

13
3A

14
4A

15
5A

16
6A

17
7A

18
8A

1
H
1.01
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2
He
4.00

3
Li
6.94

4
Be
9.01
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5
B
10.81

6
C
12.01

7
N
14.01

8
O
16.00

9
F
19.00

10
Ne
20.18

11
Na
22.99

12
Mg
24.31
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13
Al
26.98

14
Si
28.09

15
P
30.97

16
S
32.07

17
Cl
35.45

18
Ar
39.95

19
K
39.10

20
Ca
40.08

21
Sc
44.96

22
Ti
47.88

23
V
50.94

24
Cr
52.00

25
Mn
54.94

26
Fe
55.85

27
Co
58.93

28
Ni
58.69

29
Cu
63.55

30
Zn
65.39

31
Ga
69.72

32
Ge
72.61

33
As
74.92

34
Se
78.97

35
Br
79.90

36
Kr
83.80

37
Rb
85.47

38
Sr
87.62

39
Y
88.91

40
Zr
91.22

41
Nb
92.91

42
Mo
95.95

43
Tc
98.01

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

55
Cs
132.91

56
Ba
137.33

57
La
138.91

73
Hf
178.49

73
Ta
180.95

74
W
183.85

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
207.20

83
Bi
208.91

84
Po
208.88

85
At
209.99

86
Rn
222.02

87
Fr
223.01

88
Ra
226.03

89
Ac
(227)

104
Rf
(261)

105
Db
(262)

106
Sg
(263)

107
Bh
(262)

108
Hs
(265)

109
Mt
(266)

110
Ds
(281)

111
Rg
(272)

112
Cn
(285)

113
Nh
(286)

114
Fl
(289)

115
Mc
(289)

116
Lv
(293)

117
Ts
(294)

118
Og
(294)
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58
Ce
140.11

59
Pr
140.91

60
Nd
144.24

61
Pm
(145)

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
173.04

71
Lu
174.97
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90
Th
232.04

91
Pa
231.04

92
U
238.03

93
Np
(237)

94
Pu
(244)

95
Am
(243)

96
Cm
(247)

97
Bk
(247)

98
Cf
(251)

99
Es
(252)

100
Fm
(257)

101
Md
(258)

102
No
(259)

103
Lr
(262)
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