Common Polyatomic Ions

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Vocabulary flashcards listing common polyatomic ions and their corresponding chemical formulas.

Last updated 1:26 AM on 8/24/26
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40 Terms

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Arsenite

AsO33−AsO_3^{3-} .

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Acetate

A polyatomic ion with the formula C2H3O2−C_2H_3O_2^-.

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Ammonium

A polyatomic cation with the formula NH4+NH_4^+.

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Arsenate

A polyatomic ion with the formula AsO43−AsO_4^{3-}.

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Borate

A polyatomic ion with the formula BO33−BO_3^{3-}.

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Bromate

A polyatomic ion with the formula BrO3−BrO_3^-.

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Azide

A polyatomic ion with the formula N3−N_3^-.

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Benzoate

A polyatomic ion with the formula C7H5O2−C_7H_5O_2^-.

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Oxalate

A polyatomic ion with the formula C2O42−C_2O_4^{2-}.

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Tartrate

A polyatomic ion with the formula C4H4O62−C_4H_4O_6^{2-}.

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Carbonate

A polyatomic ion with the formula CO32−CO_3^{2-}.

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Hypochlorite

A polyatomic ion with the formula ClO−ClO^-.

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Chlorate

A polyatomic ion with the formula ClO3−ClO_3^-.

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Chlorite

A polyatomic ion with the formula ClO2−ClO_2^-.

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Perchlorate

A polyatomic ion with the formula ClO4−ClO_4^-.

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Chromate

A polyatomic ion with the formula CrO42−CrO_4^{2-}.

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Cyanide

A polyatomic ion with the formula CN−CN^-.

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Dichromate

A polyatomic ion with the formula Cr2O72−Cr_2O_7^{2-}.

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Dihydrogen phosphate

A polyatomic ion with the formula H2PO4−H_2PO_4^-.

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Dihydrogen phosphite

A polyatomic ion with the formula H2PO3−H_2PO_3^-.

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Hydrogen carbonate

A polyatomic ion with the formula HCO3−HCO_3^-.

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Hydrogen phosphate

A polyatomic ion with the formula HPO42−HPO_4^{2-}.

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Hydrogen phosphite

A polyatomic ion with the formula HPO32−HPO_3^{2-}.

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Hydrogen sulfate

A polyatomic ion with the formula HSO4−HSO_4^-.

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Hydrogen sulfide

A polyatomic ion with the formula HS−HS^-.

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Hydrogen sulfite

A polyatomic ion with the formula HSO3−HSO_3^-.

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Hydroxide

A polyatomic ion with the formula OH−OH^-.

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Iodate

A polyatomic ion with the formula IO3−IO_3^-.

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Manganate

A polyatomic ion with the formula MnO42−MnO_4^{2-}.

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Permanganate

A polyatomic ion with the formula MnO4−MnO_4^-.

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Nitrate

A polyatomic ion with the formula NO3−NO_3^-.

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Nitrite

A polyatomic ion with the formula NO2−NO_2^-.

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Peroxide

A polyatomic ion with the formula O22−O_2^{2-}.

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Phosphate

A polyatomic ion with the formula PO43−PO_4^{3-}.

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Phosphite

A polyatomic ion with the formula PO33−PO_3^{3-}.

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Silicate

A polyatomic ion with the formula SiO32−SiO_3^{2-}.

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Sulfate

A polyatomic ion with the formula SO42−SO_4^{2-}.

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Thiosulfate

A polyatomic ion with the formula S2O32−S_2O_3^{2-}.

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Sulfite

A polyatomic ion with the formula SO32−SO_3^{2-}.

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Thiocyanate

A polyatomic ion with the formula SCN−SCN^-.