Common Polyatomic Ions and Their Formulas

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49 Terms

1
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NO₃⁻

Nitrate

2
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NO₂⁻

Nitrite

3
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N³⁻

Nitride

4
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SO₄²⁻

Sulfate

5
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SO₃²⁻

Sulfite

6
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S²⁻

Sulfide

7
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PO₄³⁻

Phosphate

8
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PO₃³⁻

Phosphite

9
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P³⁻

Phosphide

10
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Cl⁻

Chloride

11
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ClO⁻

Hypochlorite

12
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ClO₂⁻

Chlorite

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ClO₃⁻

Chlorate

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ClO₄⁻

Perchlorate

15
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Br⁻

Bromide

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BrO⁻

Hypobromite

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BrO₂⁻

Bromite

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BrO₃⁻

Bromate

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BrO₄⁻

Perbromate

20
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I⁻

Iodide

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IO⁻

Hypoiodite

22
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IO₂⁻

Iodite

23
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IO₃⁻

Iodate

24
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IO₄⁻

Periodate

25
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HCO₃⁻

Hydrogen carbonate (bicarbonate)

26
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HSO₄⁻

Hydrogen sulfate (bisulfate)

27
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HSO₃⁻

Hydrogen sulfite (bisulfite)

28
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HPO₄²⁻

Hydrogen phosphate

29
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H₂PO₄⁻

Dihydrogen phosphate

30
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H₂PO₃⁻

Dihydrogen phosphite

31
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CO₃²⁻

Carbonate

32
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CN⁻

Cyanide

33
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SCN⁻

Thiocyanate

34
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O₂²⁻

Peroxide

35
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O₂⁻

Superoxide

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OH⁻

Hydroxide

37
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NH₄⁺

Ammonium

38
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NH₃

Ammonia (not an ion)

39
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C₂H₃O₂⁻

Acetate

40
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C₂O₄²⁻

Oxalate

41
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CrO₄²⁻

Chromate

42
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Cr₂O₇²⁻

Dichromate

43
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MnO₄⁻

Permanganate

44
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S₂²⁻

Disulfide

45
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S₂O₃²⁻

Thiosulfate

46
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AsO₄³⁻

Arsenate

47
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BO₃³⁻

Borate

48
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H₃O⁺

Hydronium

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P₂O₇⁴⁻

Pyrophosphate