1
hydrogen-H
2
helium-He
3
Lithium-Li
4
Beryllium-Be
5
Boron-B
6
carbon-C
7
Nitrogen-N
8
oxygen-O
9
florine-F
10
Neon-Ne
11
sodium-Na
12
Magnesium-Mg
13
Aluminium-Al
14
Silcon-Si
15
Phosphorus-P
16
Sulphur-S
17
Chlorine-Cl
18
Argon-Ar
19
Potassium-K
20
Calcium-Ca
NH4
Ammonium
21
Scandium
22
Titanium
23
Vanadium