Common Polyatomic Ion Names and Formulas (copy)

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Last updated 5:15 AM on 8/26/26
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26 Terms

1
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Mercury(I)

Hg2 2+

2
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Ammonium

NH4 +

3
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Nitrite

NO2 -

4
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Nitrate

NO3 -

5
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Sulfite

SO3 2-

6
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Sulfate

SO4 2-

7
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Hydrogen sulfate

HSO4 -

8
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Hydroxide

OH-

9
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Cyanide

CN-

10
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Phosphate

PO4 3-

11
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Hydrogen phosphate

HPO4 2-

12
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Dihydrogen phosphate

H2PO4 -

13
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Thiocyanate

NCS- or SCN-

14
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Carbonate

CO3 2-

15
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Hydrogen carbonate or Bicarbonate

HCO3 -

16
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Hypochlorite

ClO- or OCI-

17
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Chlorite

ClO2 -

18
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Chlorate

ClO3 -

19
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Perchlorate

ClO4 -

20
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Acetate

C2H3O2-

21
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Permanganate

MnO4 -

22
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Dichromate

Cr2O7 2-

23
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Chromate

CrO4 2-

24
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Peroxide

O2 2-

25
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Oxalate

C2O4 2-

26
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Thiosulfate

S2O3 2-