Hydrogen
Helium
Lithium
Beryllium
Boron
H
He
Li
Be
B
Carbon
Nitrogen
Oxygen
Fluorine
Neon
C
N
O
F
Ne
Sodium
Magnesium
Aluminium
Silicon
Phosphorous
Na
Mg
Al
Si
P
Sulphur
Chlorine
Argon
Potassium
Calcium
S
Cl
Ar
K
Ca