1
Q
Magnesium
A
Mg 12
1
Q
Sodium
A
11 Na
2
Q
Aluminium
A
13 Al
3
Q
Silicon
A
Si 14
4
Q
Phosphorus
A
15 P
5
Q
Sulfur
A
S 16
6
Q
Chlorine
A
17 Cl
7
Q
Argon
A
Ar 18
8
Q
Potassium
A
K 19
9
Q
Calcium
A
20 Ca
