Group Period 1
2
3
4
5
6
7
1
Hydrogen 1
5
6
9
18
Nitrogen 7
15.999 Sulfur 16
O
Oxygen 8
35.453 Bromine 35
Cl
18.998 Chlorine 17
F
Fluorine 9
Kr
39.948 Krypton 36
Ar
20.180 Argon 18
Ne
4.003 Neon 10
17
N
S
Br
16
Carbon 6
14.007 Phosphorus 15
32.066 Selenium 34
83.80 Xenon 54
15
Boron 5
C
P
Se
79.904 Iodine 53
Xe
14
B
12.011 Silicon 14
30.974 Arsenic 33
78.96 Tellurium 52
I
131.290 Radon 86
13
10.811
Si
As
Te
Rn
12
Aluminum
28.086 Germanium 32
74.922 Antimony 51
126.904 Astatine 85
222.018
11
Al
Ge
Sb
At
10
26.982 Gallium 31
72.61 Tin 50
127.60 Polonium 84
209.978
8
PERIODIC TABLE OF THE ELEMENTS 7
Zinc 30
Ga
Sn
Po
4
Copper 29
Zn
69.723 Indium 49
121.757 Bismuth 83
208.982
3
Helium 2
Nickel 28
Cu
65.39 Cadmium 48
In
Bi
2
Name
Cobalt 27
Ni
63.546 Silver 47
Cd
118.710 Lead 82
208.980
He
Co
58.693 Palladium 46
Ag
114.82 Thallium 81
207.2
Pb
Hydrogen 1
Beryllium 4
Iron 26
58.933 Rhodium 45
Pd
Tl
Atomic Number
1.008 Lithium 3
Be
Vanadium 23
Fe
Rh
112.411 Mercury 80
204.383
H Li 9.012 Magnesium 12
Titanium 22
V
Ru
107.868 Gold 79
Hg
Symbol
6.941 Sodium 11
Mg Scandium 21
Ti 50.942 Niobium 41
Tc
106.42 Platinum 78
200.59
Mn
Chromium Manganese 24 25
Cr
51.996 55.847 54.938 Molybdenum Technetium Ruthenium 43 42 44
1.008
H
Na 24.305 Calcium 20
Sc 47.88 Zirconium 40
Mo
102.906 Iridium 77
Au
Atomic Mass
22.990 Potassium 19
Ca 44.956 Yttrium 39
Nb
101.07 Osmium 76
196.967
13
K 40.078 Strontium 38
Zr
97.907 Rhenium 75
Pt
39.098 Rubidium 37
Y 95.94 Tungstun 74
195.08
Sr 92.906 Tantalum 73
Ir
Rb 91.224 Hafnium 72
Os
88.906 Lanthanum 57
Re
87.62 Barium 56
W
85.468 Cesium 55
Ta
Hf
192.22 Meitnerium 109
La
190.2 Hassium 108
Ba
186.207 Bohrium 107
Cs
183.84 Seaborgium 106
(266)
Lutetium 71
(265)
Ytterbium 70
(262)
Yb
(263)
Thulium 69
(262)
Tm
Db
Erbium 68
(261)
Dysprosium Holmium 66 67
Md
258.099
No
259.101
260.105
Lr
174.967 Lawrencium 103
Lu
Terbium 65
Fm
257.095
Er
Gadolinium 64
167.26 Fermium 100
Es
252.083
Ho
Gd
162.50 164.930 Californium Einsteinium 98 99
Cf
251.080
Dy
Europium 63
158.925 Berkelium 97
Bk
Tb
Eu
157.25 Curium 96
247.070
Pu
Sm
Praseodymium Neodymium Promethium Samarium 62 59 61 60
151.965 Americium 95
247.070
Pm
150.36 Plutonium 94
243.061
Nd
144.913 Neptunium 93
244.064
Pr
Serium 58
144.24 Uranium 92
237.048
Ce
140.908 Protactinium 91
Np
168.934 173.04 Mendelevium Nobelium 101 102 140.115 Thorium 90
U Pa
Cm 238.029
Th
232.038
Am 231.038
Rf
178.49 180.948 Ruthefordium Dubnium 104 105
138.906 Actinium 89
Mt
137.327 Radium 88
Hs
132.905 Francium 87
Bh
Ra
Sg
226.025
Ac
Fr 227.028
223.020
Lanthanide Series
Actinide Series 1 Mole = 6.02 × 1023