lecture 2 - 318M Krische, Lecture 2: F - 08/29/08, Ch. 1,...

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318M – Krische, Lecture 2: F - 08/29/08, Ch. 1, Covalent Bonding and Shapes of Molecules Today we review atomic structure. Be sure to see on-line handout entitled “Chapter 1 Study Guide Part 1” for further details. Elements with a filled electron shell are particularly stable (helium and neon). The stability associated with a filled electron shells is made apparent upon consideration of the ionization potentials (i.e. the energy required to remove an electron) of the elements. Conversely, electron affinities of the elements may be considered (i.e. the energy released upon gaining an electron). Why do we care about the stability of filled electron shells? Such stability represents an energetic driving force that guides the reactivity of organic molecules. Organic molecules will react in such a way as to achieve a pseudo-filled shell electronic configuration (as we’ll soon see, this is equivalent to the octet rule ). For example, 2Na(0) + F
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lecture 2 - 318M Krische, Lecture 2: F - 08/29/08, Ch. 1,...

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