Polyatomic Ions List

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Flashcards for the key polyatomic ions and their chemical formulas.

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25 Terms

1
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Acetate

CH3COO or C2H3O2

2
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Ammonium

NH4+

3
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Carbonate

CO32-

4
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Chlorate

ClO3-

5
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Chlorite

ClO2-

6
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Chromate

CrO42-

7
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Cyanide

CN-

8
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Dichromate

Cr₂O72-

9
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Dihydrogen phosphate

H2PO4-

10
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Hydrogen carbonate (Bicarbonate)

HCO3-

11
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Hydrogen phosphate

HPO42-

12
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Hydrogen sulfate (Bisulfate)

HSO4-

13
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Hydronium

H3O+

14
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Hydroxide

OH-

15
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Hypochlorite

ClO-

16
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Mercury(I) ion

Hg22+

17
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Nitrate

NO3-

18
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Nitrite

NO2-

19
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Perchlorate

ClO4-

20
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Permanganate

MnO4-

21
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Peroxide

O22-

22
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Phosphate

PO43-

23
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Sulfate

SO42-

24
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Sulfite

SO3²-

25
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Thiocyanate

SCN-