Interactive Periodic Table of the Elements |
|
Group 1
(IA) |
Group 2
(IIA) |
Group 3
(IIIB) |
Group 4
(IVB) |
Group 5
(VB) |
Group 6
(VIB) |
Group 7
(VIIB) |
Group 8
(VIIIB) |
Group 9
(VIIIB) |
Group 10
(VIIIB) |
Group 11
(IB) |
Group 12
(IIB) |
Group 13
(IIIA) |
Group 14
(IVA) |
Group 15
VA |
Group 16
(VIA) |
Group 17
(VIIA) |
Group 18
(VIIIA, 0) |
| Period 1 |
1
H
1.0
|
The top number is the element's atomic number, Z (the number of protons in the nucleus).
This letter (or letters) is the chemical symbol for the element.
The bottom number is the relative atomic mass, atomic weight, of the element.
|
2
He
4.0 |
| Period 2 |
3
Li
6.9 |
4
Be
9.0 |
|
5
B
10.8 |
6
C
12.0 |
7
N
14.0 |
8
O
16.0 |
9
F
19.0 |
10
Ne
20.2 |
| Period 3 |
11
Na
23.0 |
12
Mg
24.3 |
|
13
Al
27.0 |
14
Si
28.1 |
15
P
31.0 |
16
S
32.1 |
17
Cl
35.5 |
18
Ar
39.9 |
| Period 4 |
19
K
39.1 |
20
Ca
40.1 |
21
Sc
45.0 |
22
Ti
47.9 |
23
V
50.9 |
24
Cr
52.0 |
25
Mn
54.9 |
26
Fe
55.8 |
27
Co
58.9 |
28
Ni
58.7 |
29
Cu
63.5 |
30
Zn
65.4 |
31
Ga
69.7 |
32
Ge
72.6 |
33
As
74.9 |
34
Se
79.0 |
35
Br
79.9 |
36
Kr
83.8 |
| Period 5 |
37
Rb
85.5 |
38
Sr
87.6 |
39
Y
88.9 |
40
Zr
91.2 |
41
Nb
92.9 |
42
Mo
95.9 |
43
Tc
(99) |
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 |
| Period 6 |
55
Cs
132.9 |
56
Ba
137.3 |
57
La
138.9 |
72
Hf
178.5 |
73
Ta
181.0 |
74
W
183.9 |
75
Re
186.2 |
76
Os
190.2 |
77
Ir
192.2 |
78
Pt
195.1 |
79
Au
197.0 |
80
Hg
200.6 |
81
Tl
204.4 |
82
Pb
207.2 |
83
Bi
209.0 |
84
Po
(210) |
85
At
(210) |
86
Rn
(222) |
| Period 7 |
87
Fr
(223) |
88
Ra
(226) |
89
Ac
(227) |
104
Rf
(261) |
105
Db
(262) |
106
Sg
(263) |
107
Bh
(262) |
108
Hs
(265) |
109
Mt
(266) |
110
Ds
(271) |
111
Rg
(272) |
112
Cn
|
|
|
|
|
|
|
| |
Lanthanides
(Lanthanoids) |
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 |
Actinides
(Actinoids) |
90
Th
232.0 |
91
Pa
(231) |
92
U
238.1 |
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
(260) |
|
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