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11-9-10 - Lecture 13 - Chapter 9

11-9-10 - Lecture 13 - Chapter 9 - Chapter 9 Chapter Models...

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Chapter 9: Chapter 9: Models of Chemical Bonding Models of Chemical Bonding Cocaine water water BF BF 3 3 aspirin aspirin
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Chemical Bonding Chemical Bonding Problems and questions: How is a molecule or polyatomic ion held together? How are atoms distributed in a compound? Can we predict the structure? How is structure related to chemical and physical properties?
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Why Form Bonds? Why Form Bonds? Atoms form bonds by gaining, losing, or sharing enough electrons to achieve the electron configuration of the Noble Gases Bond — result of the attraction between 2 or more atoms or ions, the link between atoms Bonding occurs because it lowers the energy of the system.
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Forms of Chemical Bonds Forms of Chemical Bonds There are 3 forms of connecting or bonding atoms: Ionic complete transfer of 1 or more electrons from one atom to another Usually between a metal and non-metal Covalent valence electrons shared between atoms Usually between two or more non-metals Metallic –electrons are shared as a pool Usually between metal and metal
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The three models of chemical bonding. The three models of chemical bonding.
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Ionic Bonds Ionic Bonds Essentially the complete electron transfer from an element of
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