Common Polyatomic Ions

Vocabulary flashcards covering common polyatomic ion names, chemical formulas, and suffix naming rules.

-ite ending (polyatomic ion naming rule)

Indicates a polyatomic ion that contains one less oxygen atom than the corresponding -ate form.

Acetate

Polyatomic ion with the formula $CH_3CO_2^-$ or $CH_3COO^-$

Ammonium

Polyatomic ion with the formula $NH_4^+$

Arsenate

Polyatomic ion with the formula $AsO_4^{3-}$

Arsenite

Polyatomic ion with the formula $AsO_3^{3-}$

Azide

Polyatomic ion with the formula $N_3^-$

Borate

Polyatomic ion with the formula $BO_3^{3-}$

Bromate

Polyatomic ion with the formula $BrO_3^-$

Bromite

Polyatomic ion with the formula $BrO_2^-$

Carbonate

Polyatomic ion with the formula $CO_3^{2-}$

Chlorate

Polyatomic ion with the formula $ClO_3^-$

Chlorite

Polyatomic ion with the formula $ClO_2^-$

Chromate

Polyatomic ion with the formula $CrO_4^{2-}$

Chromite

Polyatomic ion with the formula $CrO_2^-$

Citrate

Polyatomic ion with the formula $C_6H_5O_7^{3-}$

Cyanate

Polyatomic ion with the formula $OCN^-$

Cyanide

Polyatomic ion with the formula $CN^-$

Dichromate

Polyatomic ion with the formula $Cr_2O_7^{2-}$

Dihydrogen Phosphate

Polyatomic ion with the formula $H_2PO_4^-$

Dihydrogen Phosphite

Polyatomic ion with the formula $H_2PO_3^-$

Dithionate

Polyatomic ion with the formula $S_2O_6^{2-}$

Dithionite

Polyatomic ion with the formula $S_2O_4^{2-}$

Ferricyanide

Polyatomic ion with the formula $Fe(CN)_6^{3-}$

Ferrocyanide

Polyatomic ion with the formula $Fe(CN)_6^{4-}$

Fulminate

Polyatomic ion with the formula $CNO^-$

Hydrazide

Polyatomic ion with the formula $N_2H_3^-$

Hydrogen arsenate

Polyatomic ion with the formula $HAsO_4^{2-}$

Hydrogen carbonate

Polyatomic ion with the formula $HCO_3^-$

Hydrogen Phosphate

Polyatomic ion with the formula $HPO_4^{2-}$

Hydrogen Phosphite

Polyatomic ion with the formula $HPO_3^{2-}$

Hydrogen Sulfate

Polyatomic ion with the formula $HSO_4^-$

Hydrogen Sulfite

Polyatomic ion with the formula $HSO_3^-$

Hydroxide

Polyatomic ion with the formula $OH^-$

Hypobromite

Polyatomic ion with the formula $BrO^-$

Hypochlorite

Polyatomic ion with the formula $ClO^-$

Hypoiodite

Polyatomic ion with the formula $IO^-$

Iodate

Polyatomic ion with the formula $IO_3^-$

Iodite

Polyatomic ion with the formula $IO_2^-$

Isocyanate

Polyatomic ion with the formula $NCO^-$

Manganate

Polyatomic ion with the formula $MnO_4^{2-}$

Nitrate

Polyatomic ion with the formula $NO_3^-$

Nitrite

Polyatomic ion with the formula $NO_2^-$

Oxalate

Polyatomic ion with the formula $C_2O_4^{2-}$

Ozonide

Polyatomic ion with the formula $O_3^-$

Perbromate

Polyatomic ion with the formula $BrO_4^-$

Perchlorate

Polyatomic ion with the formula $ClO_4^-$

Periodate

Polyatomic ion with the formula $IO_4^-$

Permanganate

Polyatomic ion with the formula $MnO_4^-$

Peroxide

Polyatomic ion with the formula $O_2^{2-}$

Perrhenate

Polyatomic ion with the formula $ReO_4^-$

Phosphate

Polyatomic ion with the formula $PO_4^{3-}$

Phosphite

Polyatomic ion with the formula $PO_3^{3-}$

Plumbate

Polyatomic ion with the formula $PbO_3^{2-}$

Plumbite

Polyatomic ion with the formula $PbO_2^{2-}$

Rhenate

Polyatomic ion with the formula $ReO_4^{2-}$

Selenate

Polyatomic ion with the formula $SeO_4^{2-}$

Selenite

Polyatomic ion with the formula $SeO_3^{2-}$

Silicate

Polyatomic ion with the formula $SiO_3^{2-}$

Stannate

Polyatomic ion with the formula $SnO_3^{2-}$

Stannite

Polyatomic ion with the formula $SnO_2^{2-}$

Sulfate

Polyatomic ion with the formula $SO_4^{2-}$

Sulfite

Polyatomic ion with the formula $SO_3^{2-}$

Superoxide

Polyatomic ion with the formula $O_2^-$

Thiocyanate

Polyatomic ion with the formula $SCN^-$

Thiosulfate

Polyatomic ion with the formula $S_2O_3^{2-}$

Tungstate

Polyatomic ion with the formula $WO_4^{2-}$