Common Polyatomic Ions

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Vocabulary flashcards mapping names of common polyatomic ions to their chemical formulas.

Last updated 1:36 AM on 9/7/26
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41 Terms

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Acetate

Polyatomic ion with formula C2H3O2−C_2H_3O_2^-

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Ammonium

Polyatomic ion with formula NH4+NH_4^+

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Arsenate

Polyatomic ion with formula AsO43−AsO_4^{3-}

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Arsenite

Polyatomic ion with formula AsO33−AsO_3^{3-}

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Azide

Polyatomic ion with formula N3−N_3^-

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Benzoate

Polyatomic ion with formula C7H5O2−C_7H_5O_2^-

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Borate

Polyatomic ion with formula BO33−BO_3^{3-}

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Bromate

Polyatomic ion with formula BrO3−BrO_3^-

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Carbonate

Polyatomic ion with formula CO32−CO_3^{2-}

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Chlorate

Polyatomic ion with formula ClO3−ClO_3^-

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Chlorite

Polyatomic ion with formula ClO2−ClO_2^-

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Chromate

Polyatomic ion with formula CrO42−CrO_4^{2-}

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Cyanide

Polyatomic ion with formula CN−CN^-

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Dichromate

Polyatomic ion with formula Cr2O72−Cr_2O_7^{2-}

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Dihydrogen phosphate

Polyatomic ion with formula H2PO4−H_2PO_4^-

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Dihydrogen phosphite

Polyatomic ion with formula H2PO3−H_2PO_3^-

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Hydrogen carbonate

Polyatomic ion with formula HCO3−HCO_3^-

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Hydrogen phosphate

Polyatomic ion with formula HPO42−HPO_4^{2-}

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Hydrogen phosphite

Polyatomic ion with formula HPO32−HPO_3^{2-}

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Hydrogen sulfate

Polyatomic ion with formula HSO4−HSO_4^-

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Hydrogen sulfide

Polyatomic ion with formula HS−HS^-

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Hydrogen sulfite

Polyatomic ion with formula HSO3−HSO_3^-

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Hydroxide

Polyatomic ion with formula OH−OH^-

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Hypochlorite

Polyatomic ion with formula ClO−ClO^-

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Iodate

Polyatomic ion with formula IO3−IO_3^-

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Manganate

Polyatomic ion with formula MnO42−MnO_4^{2-}

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Nitrate

Polyatomic ion with formula NO3−NO_3^-

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Nitrite

Polyatomic ion with formula NO2−NO_2^-

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Oxalate

Polyatomic ion with formula C2O42−C_2O_4^{2-}

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Perchlorate

Polyatomic ion with formula ClO4−ClO_4^-

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Permanganate

Polyatomic ion with formula MnO4−MnO_4^-

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Peroxide

Polyatomic ion with formula O22−O_2^{2-}

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Phosphate

Polyatomic ion with formula PO43−PO_4^{3-}

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Phosphite

Polyatomic ion with formula PO33−PO_3^{3-}

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Silicate

Polyatomic ion with formula SiO32−SiO_3^{2-}

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Sulfate

Polyatomic ion with formula SO42−SO_4^{2-}

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Sulfite

Polyatomic ion with formula SO32−SO_3^{2-}

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Tartrate

Polyatomic ion with formula C4H4O62−C_4H_4O_6^{2-}

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Thiocyanate

Polyatomic ion with formula SCN−SCN^-

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Thiosulfate

Polyatomic ion with formula S2O32−S_2O_3^{2-}