10-05-11-Naming-part2-v2

10-05-11-Naming-part2-v2 - Naming Compounds and Molecules,...

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10-05-11 1 Naming Compounds and Molecules, Pt2 Lynn A. Melton University of Texas at Dallas October 05, 2011
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Naming Compounds (Nomenclature) The goal is to be able to move flawlessly and quickly between the ionic formula/molecular formula and the systematic name /common name . You must both know the systematic rules and how to use them; memorize names and formulas when non- systematic names occur. 10-05-11 2
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Ionic Compounds Ionic compounds are electrically neutral. Make sure that the formula requires equal numbers of positive and negative charges. – Al 2 O 3 consists of 2 Al 3+ and 3 O 2- – Al 2 (CO 3 ) 3 consists of 2 Al 3+ and 3 CO 3 2- 10-05-11 3
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Naming Ions Most Group 1A, 2A, and 3A ions have positive charge [ cation ] equal to their group number. The name consists of the element name plus the word “ion”: K + , potassium ion Sr 2+ , strontium ion Al 3+ , aluminum ion 10-05-11 4
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Naming Ions Most Group 4A, 5A, 6A, and 7A ions have negative charge [ anion ] equal to their group number minus 8. The name consists of the element name plus the suffix “ide” and the word “ion”: O 2- , oxide ion N 3- , nitride ion F - , fluoride ion 10-05-11 5
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Naming Ions Certain metals, particularly transition metals, can form cations of more than one positive charge. Systematic nomenclature (Stock system) designates different cations with Roman numerals equal to the positive charges. Mn 2+ , Mn(II) , “manganese two ion” Fe 3+ , Fe(III) , “iron three ion” 10-05-11 6
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Naming Ions 10-05-11 7
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Naming Binary Ionic Compounds Binary ionic compounds consist of two ions, one
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10-05-11-Naming-part2-v2 - Naming Compounds and Molecules,...

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