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Polyatomic Ions
Acetate
C2H3O2 -
Cyanide
CN-
Hydroxide
OH-
Carbonate
CO3 -2
Nitrite
NO2 -
Nitrate
NO3 -
Sulfate
SO4 -2
Sulfite
SO3 -2
Phosphate
PO4 -3
Phosphite
PO3 -3
Ammonium
NH4 +