24 Common Polyatomic Ions

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Last updated 3:25 AM on 8/6/26
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24 Terms

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Hypochlorite

ClO⁻ (charge -1)

2
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Chlorite

ClO₂⁻ (charge -1)

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Chlorate

ClO₃⁻ (charge -1)

4
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Perchlorate

ClO₄⁻ (charge -1)

5
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Nitrate

NO₃⁻ (charge -1)

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Bromate

BrO₃⁻ (charge -1)

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Iodate

IO₃⁻ (charge -1)

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Permanganate

MnO₄⁻ (charge -1)

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Acetate

C₂H₃O₂⁻ or CH₃COO⁻ (charge -1)

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Cyanide

CN⁻ (charge -1)

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Thiocyanate

SCN⁻ (charge -1)

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Hydroxide

OH⁻ (charge -1)

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Peroxide

O₂²⁻ (charge -2)

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Chromate

CrO₄²⁻ (charge -2)

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Dichromate

Cr₂O₇²⁻ (charge -2)

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Sulfate

SO₄²⁻ (charge -2)

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Oxalate

C₂O₄²⁻ (charge -2)

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Carbonate

CO₃²⁻ (charge -2)

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Silicate

SiO₄⁴⁻ (charge -4)

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Arsenate

AsO₄³⁻ (charge -3)

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Mercury(I)

Hg₂²⁺ (charge +2, diatomic)

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Mercury(II)

Hg²⁺ (charge +2)

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Hydronium

H₃O⁺ (charge +1)

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Ammonium

NH₄⁺ (charge +1)