1
Q
Sodium
A
Na
2
Q
Lithium
A
Li
3
Q
Potassium
A
K
4
Q
Lead
A
Pb
5
Q
Gold
A
Au
6
Q
Silver
A
Ag
7
Q
Iron
A
Fe
8
Q
Tin
A
Sn
9
Q
Magnesium
A
Mg
10
Q
Cobalt
A
Co
11
Q
Copper
A
Cu
12
Q
Nickel
A
Ni
13
Q
Zinc
A
Zn
14
Q
Beryllium
A
Be
15
Q
Tungsten
A
W
16
Q
Uranium
A
U
17
Q
Mercury
A
Hg
18
Q
Aluminium
A
Al
19
Q
Calcium
A
Ca
20
Q
Boron
A
B
21
Q
Titanium
A
Ti
