Chapter 13 Notes - Bent(or angular Bond Angle 120 4 Four...

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Chapter 13- Structure and Shape I. Writing Lewis Electron Dot Structures for Molecules A. Skeleton Structure 1. The more electronegative atoms usually surround the less electronegative atom. (H is never the central atom) 2. Symmetrical formulas result in symmetrical structures 3. Oxoacids have oxygen bonded to the central atom with one or more of the oxygens having a hydrogen attached to it. 4. If there are several possible structures, the structure having each atom forming as many bonds as the number of electrons needed to complete its octet is preferred. 3. Three electron pairs(trigonal Planar Arrangement) a. THree bonding pairs; molecular Geom; Trigonal Planar; Bond Angle: 120 degrees b. Two bonding pairs, one non-bonding pair; molecular geometry:
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Unformatted text preview: Bent(or angular); Bond Angle 120 4. Four electron pairs (Tetrahedral Arrangement) a. Four bonding pairs; Molecular Geometry: Tetrahedral; Bond Angle: 109.5 degrees b. Three bonding pairs, one non-bonding pair; Molecular Geometry: Trigonal Pyramidal; Bond Angle: 107.5 degrees c. Two bonding pairs, two non-bonding pairs; Molecular Geometry: Angular or Bent; Bond Angle: 104.5 degrees III. Polar Molecules A. What are polar molecules? Polar molecules have an unsymmetrical distribution of charge. B. How do we tell if a molecule is polar or nonpolar? 1. It must contain polar covalent bonds 2. It must have a molecular shape which will give it a positive end and a negative end....
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Chapter 13 Notes - Bent(or angular Bond Angle 120 4 Four...

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