H
Li
Sodium
Potassium
Be
Mg
Calcium
Chromium
Mn
Co
Iron
Copper
Ni
Zn
Boron
Aluminium
Si
C
Nitrogen
Oxygen
P
S
Gold
Mercury
Ag
Pb
F
Cl
Br
I
Helium
Neon
Argon
Krypton
As