Periodic Table of Elements Reference Link

Period

Group**
       

1
IA
1A

18
V IIIA
8A

1

2
IIA
2A

13
IIIA
3A

14
IVA
4A

15
VA
5A

16
VIA
6A

17
VIIA
7A

2
He
4.003

2

4
Be
9.012

5
B 10.81

6
C
12.01

7
N 14.01

8
O 16.00

9
F 19.00

10
Ne
20.18

3

12
Mg 24.31

3
IIIB
3B

4
IVB
4B

5
VB
5B

6
VIB
6B

7
VIIB
7B

8

9

10

11
IB
1B

12
IIB
2B

13
Al
26.98

14
Si
28.09

15
P
30.97

16
S
32.07

17
Cl 35.45

18
Ar
39.95

------- VIII -------
------- 8 -------

4

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
72.59

33
As
74.92

34
Se
78.96

35
Br
79.90

36
Kr
83.80

5

38
Sr
87.62

39
Y
88.91

40
Zr
91.22

41
Nb
92.91

42
Mo
95.94

43
Tc
(98)

44
Ru
101.1

45
Rh
102.9

46
Pd
106.4

47
Ag
107.9

48
Cd
112.4

49
In
114.8

50
Sn
118.7

51
Sb
121.8

52
Te
127.6

53
I
126.9

54
Xe
131.3

6

56
Ba
137.3

57
La * 138.9

72
Hf
178.5

73
Ta
180.9

74
W
183.9

75
Re
186.2

76
Os
190.2

77
Ir
190.2

78
Pt
195.1

79
Au
197.0

80
Hg
200.5

81
Tl
204.4

82
Pb
207.2

83
Bi
209.0

84
Po
(210)

85
At
(210)

86
Rn
(222)

7

88
Ra
(226)

89
Ac ~ (227)

104
Rf
(257)

105
Db
(260)

106
Sg
(263)

107
Bh
(262)

108
Hs
(265)

109
Mt
(266)

110
Ds
(271)

111
Uuu
(272)

112
Uub
(277)

114
Uuq
(296)

116
Uuh
(298)

118
Uuo
(?)

Lanthanide Series*

58
Ce
140.1

59
Pr
140.9

60
Nd
144.2

61
Pm
(147)

62
Sm
150.4

63
Eu
152.0

64
Gd
157.3

65
Tb
158.9

66
Dy
162.5

67
Ho
164.9

68
Er
167.3

69
Tm 168.9

70
Yb
173.0

71
Lu
175.0

Actinide Series~

90
Th
232.0

91
Pa
(231)

92
U
(238)

93
Np
(237)

94
Pu
(242)

95
Am
(243)

96
Cm
(247)

97
Bk
(247)

98
Cf
(249)

99
Es
(254)

100
Fm
(253)

101
Md
(256)

102
No
(254)

103
Lr
(257)