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Understanding Covalent Bonds: Structure and Polarity

Learn about Lewis structures, formal charge, bond polarity, hybridization, and molecule orbital structures in this session. Understand how electronegativity affects bond polarity. Discover how polar covalent bonds create partial charges on atoms.

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Understanding Covalent Bonds: Structure and Polarity

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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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