Hydrogen
H
Helium
He
lithium
Li
beryllium
Be
boron
B
carbon
C
nitrogen
N
oxygen
O
fluorine
F
Neon
Ne
Sodium
Na
Magnesium
Mg
Aluminium
Al
silicon
Si
phosphorus
P
sulphur
S
chlorine
Cl
argon
Ar
potassium
K
calcium
Ca
iron
Fe
Copper
Cu
Zinc
Zn
Mercury
Hg
Lead
Pb
Uranium
U
Silver
Ag
Gold
Au