1 (shortform)
Hydrogen (H)
2
Helium (he)
3
Lithium (li)
4
Beryllium (be)
5
Boron (B)
6
Carbon c
7
Nitrogen n
8
Oxygen o
9
Fluorine f
10
Neon ne
11
Sodium NA
12
Magnesium Mg
13
Aluminium al
14
Silicon
15
Phosphorus p
16
Sulphur s
17
Chlorine cl
18
Argon Ar
19
Potassium K
20
Calcium ca