4
He
Helium
2
7
Li
Lithium
3
9
Be
Beryllium
4
11
B
Boron
5
12
C
Carbon
6
14
N
Nitrogen
7
16
O
Oxygen
8
19
F
Fluorine
9
20
Ne
Neon
10
23
Na
Sodium
11
24
Mg
Magnesium
12
27
Al
Aluminium
13
28
Si
Silicon
14
31
P
Phosphorus
15
32
S
Sulfur
16
35.5
Cl
Chlorine
17
40
Ar
Argon
18
39
K
Potassium
19
40
Ca
Calcium
20
45
Sc
Scandium
21
48
Ti
Titanium
22
51
V
Vanadium
23
52
Cr
Chromium
24
55
Mn
Manganese
25
56
Fe
Iron
26
59
Co
Cobalt
27
59
Ni
Nickel
28
63.5
Cu
Copper
29
65
Zn
Zinc
30
70
Ga
Gallium
31
73
Ge
Germanium
32
75
As
Arsenic
33
79
Se
Selenium
34
80
Br
Bromine
35
84
Kr
Krypton
36
86
Rb
Rubidium
37
88
Sr
Strontium
38
89
Y
Yttrium
39
91
Zr
Zirconium
40
93
Nb
Niobium
41
96
Mo
Molybdenum
42
99
Tc
Technetium
43
101
Ru
Ruthenium
44
103
Rh
Rhodium
45
106
Pd
Palladium
46
108
Ag
Silver
47
112
Cd
Cadmium
48
115
In
Indium
49
119
Sn
Tin
50
122
Sb
Antimony
51
128
Te
Tellurium
52
127
I
Iodine
53
131
Xe
Xenon
54
133
Cs
Caesium
55
137
Ba
Barium
56
139
La
Lanthanum
57
179
Hf
Hafnium
72
181
Ta
Tantalum
73
184
W
Tungsten
74
186
Re
Rhenium
75
190
Os
Osmium
76
192
Ir
Iridium
77
195
Pt
Platinum
78
197
Au
Gold
79
201
Hg
Mercury
80
204
Tl
Thallium
81
207
Pb
Lead
82
209
Bi
Bismuth
83
210
Po
Polonium
84
210
At
Astatine
85
222
Rn
Radon
86
223
Fr
Francium
87
226
Ra
Radium
88
227
Ac
Actinium
89
THE PERIODIC TABLE
1 2 Group 3 4 5 6 7 0
1
H
Hydrogen
1
A
r
Symbol
Name
Z
relative atomic mass
atomic number
Key
