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9-23-11-Compounds - Compounds and Molecules Lynn A Melton...

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9-23-11 1 Compounds and Molecules Lynn A. Melton University of Texas at Dallas September 23, 2011
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Quiz #3 Material from Wednesday 9/21 and Friday 9/23. Emphasis on ionic compounds and initial use of Lewis dot diagrams and bonding Please take Quiz #3 on Monday 9/26! Representatives of McGraw-Hill will be on campus to trouble shoot problems. 9-23-11 2
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9-23-11 3 Why tinker with tinketoys? Fundamental Concepts of Chemistry 1. Atoms 2. Bonding/Molecules/Reactions 3. Structure/Properties Activity of molecule derives from its structure
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Bonding 9-23-11 4 dissociation energy bond length
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Quantum Mechanics and Bonding “We know the truth, but we cannot calculate the answer”. [Not an exact quote, but I cannot find the source.] The Schroedinger Equation formulation of quantum mechanics is sufficient for atoms and bonding, but the many, many electrons present in real molecules make it impossible to solve exactly, even with the largest, fastest computers.
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