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Nomenclature - Naming Compounds I Naming Ions Positive Ions...

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Naming Compounds I. Naming Ions: Positive Ions 1. Main Group metals— use metal name + “ion” 2. Transition metal ions— use metal name, followed by the charge in parentheses using roman numerals, + “ion” (exceptions = Zn 2+ , Ag + , Cd 2+ ) [V 4+ : Vandium(IV) ion] Negative Ions 1. Monoatomic ions— change ending of the element name to “ide” [Cl : Chloride] 2. Oxoanions— use the name of the element combined with oxygen as the root of the name then add the appropriate suffixes and prefixes as indicated below: a) For a two different oxoanions of the same element: Higher # of oxygens use the suffix “-ate” [NO 3 : nitrate] Lower # of oxygens use the suffix “-ite” [NO 2 : nitrite] b) For a series of more than two oxanions of the same element : Highest # of oxygens use the prefix “per-” and the suffix “-ate” Lowest # of oxygens use the prefix “hypo-” and the suffix “-ite” For the middle anions of the series use the priority above ClO 4 : perchlorate ClO 3 : chlorate
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