APChem Common Polyatomic Ions

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Last updated 1:16 AM on 8/26/26
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25 Terms

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Mercury (I)

Hg₂²⁺

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Ammonium

NH₄⁺

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Nitrite

NO₂⁻

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Nitrate

NO₃⁻

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Sulfite

SO₃²⁻

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Sulfate

SO₄²⁻

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Hydrogen Sulfate

HSO₄⁻

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Hydroxide

OH⁻

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Cyanide

CN⁻

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Phosphate

PO₄³⁻

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Hydrogen Phosphate

HPO₄²⁻

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Dihydrogen Phosphate

H₂PO₄⁻

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Thiocyanate

NCS⁻

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Carbonate

CO₃²⁻

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Hydrogen Carbonate

HCO₃⁻

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Hypochlorite

ClO⁻

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Chlorite

ClO₂⁻

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Chlorate

ClO₃⁻

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Perchlorate

ClO₄⁻

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Acetate

C₂H₃O₂⁻

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Permanganate

MnO₄⁻

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Dichromate

Cr₂O₇²⁻

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Chromate

CrO₄²⁻

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Peroxide

O₂²⁻

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Oxalate

C₂O₄²⁻