Polyatomic Ions List

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Vocabulary flashcards mapping common polyatomic ions and anions to their chemical formulas based on the lecture notes.

Last updated 8:02 AM on 9/8/26
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59 Terms

1
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Acetate

Polyatomic ion with formula CH3COO−\text{CH}_3\text{COO}^- or C2H3O2−\text{C}_2\text{H}_3\text{O}_2^-

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Ammonium

Polyatomic ion with formula NH4+\text{NH}_4^+

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Arsenate

Polyatomic ion with formula AsO43−\text{AsO}_4^{3-}

4
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Arsenite

Polyatomic ion with formula AsO33−\text{AsO}_3^{3-}

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Azide

Polyatomic ion with formula N3−\text{N}_3^-

6
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Bicarbonate (Hydrogen carbonate)

Polyatomic ion with formula HCO3−\text{HCO}_3^-

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Borate

Polyatomic ion with formula BO33−\text{BO}_3^{3-}

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Tetraborate

Polyatomic ion with formula B4O72−\text{B}_4\text{O}_7^{2-}

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Bromate

Polyatomic ion with formula BrO3−\text{BrO}_3^-

10
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Bromite

Polyatomic ion with formula BrO2−\text{BrO}_2^-

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Carbonate

Polyatomic ion with formula CO32−\text{CO}_3^{2-}

12
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Chlorate

Polyatomic ion with formula ClO3−\text{ClO}_3^-

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Chlorite

Polyatomic ion with formula ClO2−\text{ClO}_2^-

14
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Chromate

Polyatomic ion with formula CrO42−\text{CrO}_4^{2-}

15
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Cyanide

Polyatomic ion with formula CN−\text{CN}^-

16
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Dichromate

Polyatomic ion with formula Cr2O72−\text{Cr}_2\text{O}_7^{2-}

17
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Dihydrogen arsenate

Polyatomic ion with formula H2AsO4−\text{H}_2\text{AsO}_4^-

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Dihydrogen phosphate

Polyatomic ion with formula H2PO4−\text{H}_2\text{PO}_4^-

19
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Dihydrogen phosphite

Polyatomic ion with formula H2PO3−\text{H}_2\text{PO}_3^-

20
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Hydrogen sulfide

Polyatomic ion with formula HS−\text{HS}^-

21
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Hydride

Anion with formula H−\text{H}^-

22
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Hydrogen arsenate

Polyatomic ion with formula HAsO42−\text{HAsO}_4^{2-}

23
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Hydrogen phosphate

Polyatomic ion with formula HPO42−\text{HPO}_4^{2-}

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Hydrogen phosphite

Polyatomic ion with formula HPO32−\text{HPO}_3^{2-}

25
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Hydrogen sulfate

Polyatomic ion with formula HSO4−\text{HSO}_4^-

26
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Hydrogen sulfite

Polyatomic ion with formula HSO3−\text{HSO}_3^-

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Hydrogen telluride

Polyatomic ion with formula HTe−\text{HTe}^-

28
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Hydronium

Polyatomic ion with formula H3O+\text{H}_3\text{O}^+

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Hydroxide

Polyatomic ion with formula OH−\text{OH}^-

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Hypobromite

Polyatomic ion with formula BrO−\text{BrO}^-

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Hypochlorite

Polyatomic ion with formula ClO−\text{ClO}^-

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Hypoiodite

Polyatomic ion with formula IO−\text{IO}^-

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Periodate

Polyatomic ion with formula IO4−\text{IO}_4^-

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Iodate

Polyatomic ion with formula IO3−\text{IO}_3^-

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Triiodide

Polyatomic ion with formula I3−\text{I}_3^-

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Iodite

Polyatomic ion with formula IO2−\text{IO}_2^-

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Mercury (I)

Cation with formula Hg22+\text{Hg}_2^{2+}

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Molybdate

Polyatomic ion with formula MoO42−\text{MoO}_4^{2-}

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Nitrate

Polyatomic ion with formula NO3−\text{NO}_3^-

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Nitrite

Polyatomic ion with formula NO2−\text{NO}_2^-

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Oxalate

Polyatomic ion with formula C2O42−\text{C}_2\text{O}_4^{2-}

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Oxide

Anion with formula O2−\text{O}^{2-}

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Perbromate

Polyatomic ion with formula BrO4−\text{BrO}_4^-

44
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Perchlorate

Polyatomic ion with formula ClO4−\text{ClO}_4^-

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Permanganate

Polyatomic ion with formula MnO4−\text{MnO}_4^-

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Peroxide

Polyatomic ion with formula O22−\text{O}_2^{2-}

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Peroxydisulfate

Polyatomic ion with formula S2O82−\text{S}_2\text{O}_8^{2-}

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Phosphate

Polyatomic ion with formula PO43−\text{PO}_4^{3-}

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Phosphite

Polyatomic ion with formula PO33−\text{PO}_3^{3-}

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Selenate

Polyatomic ion with formula SeO42−\text{SeO}_4^{2-}

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Selenite

Polyatomic ion with formula SeO32−\text{SeO}_3^{2-}

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Silicate

Polyatomic ion with formula SiO32−\text{SiO}_3^{2-}

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Sulfate

Polyatomic ion with formula SO42−\text{SO}_4^{2-}

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Sulfite

Polyatomic ion with formula SO32−\text{SO}_3^{2-}

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Superoxide

Polyatomic ion with formula O2−\text{O}_2^-

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Tellurate

Polyatomic ion with formula TeO42−\text{TeO}_4^{2-}

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Tellurite

Polyatomic ion with formula TeO32−\text{TeO}_3^{2-}

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Thiocyanate

Polyatomic ion with formula SCN−\text{SCN}^-

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Thiosulfate

Polyatomic ion with formula S2O32−\text{S}_2\text{O}_3^{2-}