Nomenclature of Binary Ionic Compounds

Nomenclature of Binary Ionic Compounds - Example: Potassium...

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Nomenclature of Binary Ionic Compounds Binary compounds are composed of two elements. When one of these elements is a metal and one is a nonmetal, an ionic compound is formed. - Metals give off electrons and form cations in ionic compounds. - Nonmetals pick up electrons and form anions in ionic compounds. Ionic compounds are named by stating the cation name and then the anion name. The number of cations or anions is not specified . The number of each is understood because the overall charge must equal zero. The charge of each ion in a binary compound is determined from the periodic table. For main group elements: Cation name = name of element Cation Charge = Group number
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Unformatted text preview: Example: Potassium is a Group 1A metal. It forms the +1 potassium cation: K + Anion name = element name with the ending replaced by the suffix "ide" . Anion Charge = Group number - 8 Example: Sulfur is a Group 6A nonmetal. It forms the (6 - 8 = -2) sulfide anion: S 2-Compound name = cation name + anion name Compound Charge = 0 The number of cations and anions must balance so that the overall charge is zero. Example: Potassium sulfide = K 2 S Note that there must be 2 potassium 1+ cations because sulfide has a 2- charge. Note also that the name ends in ide . Binary compounds always end in 'ide'....
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This note was uploaded on 02/10/2009 for the course CHEMISTRY 105 taught by Professor Brozak during the Spring '09 term at Washington State University .

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