Hydrogen
H+
Ammonium
NH4 +
Potassium
K+
Silver
Ag+
Sodium
Na+
Calcium
Ca 2+
Copper(II)
Cu 2+
Iron(II)
Fe 2+
Lead(II)
Pb 2+
Magnesium
Mg 2+
Zinc
Zn 2+
Aluminium
Al 3+
Iron(III)
Fe 3+
Bromide
Br-
Chloride
Cl-
Hydroxide
OH-
Hydrogen Carbonate
HCO3 -
Iodide
I-
Nitrate
NO3 -
Carbonate
CO3 2-
Oxide
O 2-
Sulphate
SO4 2-
Sulphide
S 2-
Nitride
N 3-