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CHEM 240 003 SI Session 2 Jan 12, 2009

Review of Last Session. Electronegativity: increases left-to-right and bottom-to-top. sp3

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CHEM 240 003 SI Session 2 Jan 12, 2009

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    1. CHEM 240 – 003 SI Session #2 Jan 12, 2009

    2. Review of Last Session Electronegativity: increases left-to-right and bottom-to-top. sp3 – tetrahedral sp2 – trigonal planar sp – linear Polar covalent bond: electrons shared unequally. Formal Charge = Group # - # of nonbonding electrons – # of bonds.

    3. Objectives Learn to: Draw Lewis Structures, and Determine Formal Charge Determine Bond Polarity (ELECTRONEGATIVITY) Understand hybridization and the orbital structure of molecules.

    4. Summary A polar covalent bond results in a partial negative charge on the more electronegative (EN) atom, and a partial positive charge on the less EN atom. H - F

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