Polyatomic Ions

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36 Terms

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Acetate

C2H3O2−

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Carbonate

CO32−

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Hydrogen carbonate/bicarbonate

HCO3−

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Hydroxide

OH−

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Nitrite

NO2−

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Nitrate

NO3−

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Chromate

CrO42−

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Dichromate

Cr2O72−

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Phosphate

PO43−

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Hydrogen phosphate

HPO42−

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Dihydrogen phosphate

H2PO4−

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Ammonium

NH4+

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Hypochlorite

ClO-

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Chlorite

ClO2-

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Chlorate

ClO3-

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Perchlorate

ClO4-

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Permanganate

MnO4−

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Sulfite

SO32−

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Hydrogen sulfite/bisulfite

HSO3-

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Sulfate

SO42−

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Hydrogen sulfate/bisulfate

HSO4−

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Cyanide

CN−

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Peroxide

O2 2-

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Hydronium

H3O+

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Chromium

Cr 2+

Cr 3+

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Iron

Fe 2+

Fe 3+

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Cobalt

Co 2+

Co 3+

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Copper

Cu +

Cu 2+

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Tin

Sn 2+

Sn 4+

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Mercury

Hg 2 2+

Hg 2+

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Empirical formula

The lowest whole-number ratio of atoms of each element found in a compound

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Molecular formula

Number of atoms in each element found in one molecule of the compound

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Systematic names

Names using roman numerals (I, II, III)

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Name of the compound

Use of the greek prefix (di, tetra)

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Ionic - metal/nonmetal

“Calcium iodide”

“Iron(III) chloride”

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Molecular - nonmetals only

“Diphosphorous pentoxide”

  • Greek prefixes