1
Q
Oxygen
A
O
2
Q
Hydrogen
A
H
3
Q
Helium
A
He
4
Q
Argon
A
Ar
5
Q
Neon
A
Ne
6
Q
Chlorine
A
Cl
7
Q
Carbon
A
C
8
Q
Sulphur
A
S
9
Q
Nitrogen
A
N
10
Q
Silicon
A
Si
11
Q
Bromine
A
Br
12
Q
Iodine
A
I
13
Q
Fluorine
A
F
14
Q
Phosphorus
A
P
