ammonium
NH4 +
hydronium
H3O +
peroxide
O2 2-
hydroxide
OH -
acetate
CH3COO -
C2H3O2 -
cyanide
CN -
azide
N3 -
carbonate
CO3 2-
bicarbonate
HCO3 -
nitrate
NO3 -
nitrite
NO2 -
sulfate
SO4 2-
hydrogen sulfate
HSO4 -
sulfite
SO3 2-
hydrogen sulfite
HSO3 -
phosphate
PO4 3-
hydrogen phosphate
HPO4 2-
dihydrogen phosphate
H2PO4 -
perchlorate
ClO4 -
chlorate
ClO3 -
chlorite
ClO2 -
hypochlorite
ClO -
chromate
CrO4 2-
dichromate
Cr2O7 2-