Common Polyatomic Ions

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Vocabulary flashcards covering 28 common polyatomic ions and their chemical formulas.

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28 Terms

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Ammonium

NH₄⁺

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Cyanide

CN⁻

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Hydronium

H₃O⁺

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Nitrate

NO₃⁻

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Acetate

CH₃COO⁻ (also written C₂H₃O₂⁻)

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Permanganate

MnO₄⁻

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Chlorate

ClO₃⁻

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Sulfate

SO₄²⁻

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Carbonate

CO₃²⁻

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Chromate

CrO₄²⁻

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Dichromate

Cr₂O₇²⁻

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Peroxide

O₂²⁻

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Phosphate

PO₄³⁻

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Silicate

SiO₃²⁻

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Bromate

BrO₃⁻

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Iodate

IO₃⁻

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Mercury(I) (Mercurous)

Hg₂²⁺

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Azide

N₃⁻

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Sulfite

SO₃²⁻

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Phosphite

PO₃³⁻

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Chlorite

ClO₂⁻

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Oxalate

C₂O₄²⁻

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Bicarbonate (Hydrogen carbonate)

HCO₃⁻

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Perchlorate

ClO₄⁻

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Hypochlorite

ClO⁻

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Bisulfate (Hydrogen sulfate)

HSO₄⁻

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Hydrogen phosphate

HPO₄²⁻

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Dihydrogen phosphate

H₂PO₄⁻