H+
hydrogen
NH4+
ammonium
Hg2 2+
mercury(1)
H-
hydride
CN-
cyanide
OH-
hydroxide
MnO4-
permanganate
C2H3O2-
acetate
NO2-
nitrite
NO3-
nitrate
SCN-
thiocyanate
HCO3-
bicarbonate or hydrogen carbonate
HSO3-
bisulfite or hydrogen sulfite
HSO4-
bisulfate or hydrogen sulfate
CIO-
hypochlorite
CIO2-
chlorite
CIO3-
chlorate
CIO4-
perchlorate
O2 2-
peroxide
C2O4 2-
oxalate
Cr2O7 2-
dichromate
CO3 2-
carbonate
SO3 2-
sulfite
SO4 2-
sulfate