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Naming Polyatomic Ions - Notes

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Subject: 
Chemistry
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Tags: 
Acids
Chemical nomenclature
ions
Oxoanions
Cations
Polyatomic ion
Oxoacid
IUPAC nomenclature of inorganic chemistry
Oxidation state
Sulfate
Nonmetal
Nitrate

Naming polyatomic ions and acids Definition Polyatomic ions are similar to monatomic ions in that they both have an ionic charge (+ or -). Polyatomic ions are made of two or more atoms that act as a unit Examples ? Naming compounds with polyatomic ions Nitrate ion NO3-1 Phosphate ion PO4-3 Sulfate ion SO4-2 Ammonium ion NH4+1 Naming polyatomic ions The name of the ion usually ends in either -ite or -ate. The -ite ending indicates a low oxidation state (NO-2 ion - nitrite ion). The -ate ending indicates a high oxidation state (NO-3 ion - nitrate ion). Naming polyatomic ions Prefixes also can be used. The prefix hypo- indicates the very lowest oxidation state. (ClO- ion - hypochlorite ion)

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