120_lecture_3

120_lecture_3 - CHEM 120 Highland Community College Unit 3...

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CHEM 120 Highland Community College Unit 3 John Sullivan Fall, 2007
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Unit 3--Intro Ionic vs . molecular compounds Names & formulas of binary molecular compounds Names & formulas of ionic compounds with polyatomic ions. Lewis structures Molecular geometry
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Conductivity Apparatus molecular compound ionic compound
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Molecular vs . Ionic Molecular compounds contain only nonmetals (recall, hydrogen and the elements on the right side of the periodic table are nonmetals) NO COMPOUNDS ARE CHARGED Ionic compounds contain ions—usually a metal & a nonmetal are involved. Ionic compounds are often called salts.
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Binary Compounds Contain only two elements Names always end in - ide
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Naming Molecular Compounds Name the elements in the order the elements appear in the formula. Include the number of atoms by using the Greek prefixes on the next slide. Don’t use the prefix mono - if there’s only one of the first element.
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Problem 5.87 Name the following binary compounds: a) PI 3 Answer: phosphorus triiodide b) AsCl 3 Answer: arsenic trichloride c) P 4 S 3 Answer: tetraphosphorus trisulfide e) NI 3 Answer: nitrogen triiodide f) IF 7 Answer: iodine heptafluoride
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Problem 5.89 Write formulas for the following compounds: a) nitrogen dioxide Answer: NO 2 b) sulfur hexafluoride Answer: SF 6 c) bromine pentaiodide Answer: BrI 5 d) dinitrogen trioxide Answer: N 2 O 3 e) dinitrogen tetroxide Answer: N 2 O 4 f) arsenic pentachloride Answer: AsCl 5
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This note was uploaded on 11/06/2010 for the course CHEM 120 taught by Professor Sullivan during the Spring '10 term at Highland CC.

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120_lecture_3 - CHEM 120 Highland Community College Unit 3...

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