1372 Lec 15Sep2011

1372 Lec 15Sep2011 - 1 General Chemistry 4th edition, Hill,...

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General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry 1
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General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry 2 A molecule is a group of two or more atoms held together by covalent bonds . A molecular formula gives the number of each kind of atom in a molecule. An empirical formula simply gives the (whole number) ratio of atoms of elements in a compound. Compound Molecular formula Empirical formula Hydrogen peroxide H 2 O 2 HO Octane C 8 H 18 ???? Atoms, Molecules, and Ions Chapter Two Chapter Two Molecules and Formulas
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General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry 3 Structural formulas and models show how atoms are attached to one another. Structural Formulas and Models Ball-and-stick model Space-filling model The condensed structural formula for acetic acid is CH 3 COOH.
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General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry 4 The name consists of two words. First word: name of the element that appears first in the formula. Second word: stem of the name of the second element, ending with - ide . Names are further modified by adding prefixes to denote the numbers of atoms of each element in the molecule. Naming Binary Molecular Compounds
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General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry 5 In an ionic compound , oppositely charged ions are attracted to each other such that the compound has no net charge. Ions and Ionic Compounds There are no distinct molecules of sodium chloride. Sodium chloride simply consists of sodium ions and chloride ions, regularly arranged.
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General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry 6 Group IA metals form ions of 1+ charge.
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1372 Lec 15Sep2011 - 1 General Chemistry 4th edition, Hill,...

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