Key Polyatomic Ions: Formulas and Charges for Chemistry

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Last updated 4:43 AM on 4/16/26
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23 Terms

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Ammonium

NH₄ ⁺

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Hydroxide

OH⁻

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Permanganate

MnO₄⁻

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Acetate

CH₃COO⁻

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Nitrate

NO₃ ⁻

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Nitrite

NO₂ ⁻

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Sulfate

SO₄²⁻

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Sulfite

SO₃²⁻

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Hydrogen Sulfate

HSO₄⁻

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Carbonate

CO₃²⁻

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Hydrogen Carbonate

HCO₃ ⁻

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Chromate

CrO₄²⁻

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Dichromate

Cr₂O₇²⁻

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Phosphate

PO₄³⁻

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Phosphite

PO₃³⁻

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Hydrogen Phosphate

HPO₄²⁻

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Dihydrogen Phosphate

H₂PO₄ ⁻

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Acetate acid

CH₃COOH ⁻

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Hydrochloric acid

HCl

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Sulfuric acid

H₂SO₄

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Nitric acid

HNO₃

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Hydrogen Fluoride

HF

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Phosphoric acid

H₃PO₄