Polyatomic Ions and Oxyanion Naming Rules

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Vocabulary flashcards covering polyatomic ions, oxyanions, naming rules (-ate vs -ite), and specific polyatomic ion formulas.

Last updated 2:11 AM on 9/29/26
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30 Terms

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Polyatomic ion

An ion that has multiple covalently bonded atoms.

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Oxyanion

A polyatomic ion that contains oxygen and one other element.

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-ate suffix

The naming suffix used for the oxyanion in a series that has more oxygen atoms.

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-ite suffix

The naming suffix used for the oxyanion in a series that has less oxygen atoms.

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Ammonium

The polyatomic ion with the chemical formula NH4+NH_4^+

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Acetate

The polyatomic ion with the chemical formula C2H3O2−C_2H_3O_2^-

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Cyanide

The polyatomic ion with the chemical formula CN−CN^-

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Thiocyanate

The polyatomic ion with the chemical formula SCN−SCN^-

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Bicarbonate

The polyatomic ion with the chemical formula HCO3−HCO_3^-

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Carbonate

The polyatomic ion with the chemical formula CO32−CO_3^{2-}

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Oxalate

The polyatomic ion with the chemical formula C2O42−C_2O_4^{2-}

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Hypochlorite

The polyatomic ion with the chemical formula ClO−ClO^-

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Chlorite

The polyatomic ion with the chemical formula ClO2−ClO_2^-

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Chlorate

The polyatomic ion with the chemical formula ClO3−ClO_3^-

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Perchlorate

The polyatomic ion with the chemical formula ClO4−ClO_4^-

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Chromate

The polyatomic ion with the chemical formula CrO42−CrO_4^{2-}

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Dichromate

The polyatomic ion with the chemical formula Cr2O72−Cr_2O_7^{2-}

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Permanganate

The polyatomic ion with the chemical formula MnO4−MnO_4^-

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Nitrite

The polyatomic ion with the chemical formula NO2−NO_2^-

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Nitrate

The polyatomic ion with the chemical formula NO3−NO_3^-

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Hydroxide

The polyatomic ion with the chemical formula OH−OH^-

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Peroxide

The polyatomic ion with the chemical formula O22−O_2^{2-}

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Dihydrogen phosphate

The polyatomic ion with the chemical formula H2PO4−H_2PO_4^-

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Hydrogen phosphate

The polyatomic ion with the chemical formula HPO42−HPO_4^{2-}

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Phosphate

The polyatomic ion with the chemical formula PO43−PO_4^{3-}

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Bisulfite

The polyatomic ion with the chemical formula HSO3−HSO_3^-

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Sulfite

The polyatomic ion with the chemical formula SO32−SO_3^{2-}

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Bisulfate

The polyatomic ion with the chemical formula HSO4−HSO_4^-

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Sulfate

The polyatomic ion with the chemical formula SO42−SO_4^{2-}

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Thiosulfate

The polyatomic ion with the chemical formula S2O32−S_2O_3^{2-}