102708 - HI 2. N 2 3. NO 4. FCl Dipole Moments Dipole...

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CHEMICAL BONDING: GENERAL CONCEPTS Zumdahl Chapter 8
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Types of Bonds y Covalent – a sharing of electrons between two nuclei; non-metal with non-metal y Ionic – transfer of electrons between two atoms; metal with non-metal
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Typical Covalent Force Repulsion of nuclei D e
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Properties of Bonds y Bond length – the smallest distance between the two nuclei y Bond Energy – the energy needed to break a bond y Electronegativity – the ability of an atom to attract shared electrons to itself (not a measurable property)
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Electronegativity
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Polarity y A molecule that has a center of positive charge and a center of negative charge is said to be polar, or to have a dipole moment
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Which of the following molecules is not polar? HI N2 NO FCl 2% 1% 1% 97% 1.
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Unformatted text preview: HI 2. N 2 3. NO 4. FCl Dipole Moments Dipole Moments Dipole Moments Effect of Electric Field on Polar Molecules Relationship between Electronegativity and Bond Type Ionic vs Covalent Bonds y Ionic Bonds { Achieve e-configuration of noble gas by gaining or losing electrons { Metal with non-metal { Non-volatile (do not vaporize easily) { Ionize in polar solvents { Dissolve in polar solvents y Covalent Bonds { Share e-s to achieve noble gas configuration { Non-metal with non-metal { Often volatile (vaporize easily) { Usually non-electrolytes, weak electrolytes at best Ionic Character of Covalent Bonds Ionic vs Covalent Predicting Ionic Charges y Na y Mg y Al y F y O...
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This note was uploaded on 12/06/2009 for the course CHEM 105A taught by Professor Bau during the Fall '04 term at USC.

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102708 - HI 2. N 2 3. NO 4. FCl Dipole Moments Dipole...

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