oxalate
(C2O4)2-
cyanide
(CN)-
bicarbonate
(HCO3)-
carbonate
CO3 ^2-
nitrite
NO2-
nitrate
NO3-
bisulfate
HSO4-
sulfite
SO3^2-
dihydrogen phosphate
H2PO4-
hydrogen phosphate
HPO4^ 2-
phosphate
PO4 ^3-
hypochlorite
ClO-
chlorite
ClO2-
chlorate
ClO3-
perchlorate
ClO4-
chromate
CrO4 2-
dichromate
Cr2O7 ^2-
hydroxide
OH-
hydrogen sulfide
SH-
acetate
C2H3O2-
oxide
O^2-
peroxide
O2 ^2-
sulfide
S^2-
disulfide
S2^2-