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Exam #4 Review Session Chem 111, Fall 2009. Bond Properties Length Order Strength Polarity.

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Presentation on theme: "Exam #4 Review Session Chem 111, Fall 2009. Bond Properties Length Order Strength Polarity."— Presentation transcript:

1 Exam #4 Review Session Chem 111, Fall 2009

2 Bond Properties Length Order Strength Polarity

3 Periodic Table

4 Bond Properties Which atom is more electronegative?  B or C  N or P Which bond is most polar?  C-C or C-O or C-F  C-O or C-S Which bond is the longest?  C-O or C-F  C-O or C=O

5 Lewis Structures Why We Love Them (and you know we do!) Drawing a Lewis Structure: – Calculating formal charge – Determining which resonance structure is best Use Lewis Structure to: – Determine bond order – Determine electron pair and molecular geometry – Calculate formal charge and oxidation numbers – Determine hybridization and bond types

6 Draw a Lewis Structure for CS 2

7 Periodic Table

8 Formal Charges and Oxidation Numbers : : : : : :

9 Molecular Geometry # Structural Pairs Electron Pair Geometry Angle Molecular Geometry Number of Lone Pairs Linear180°Linear 3trigonal planar120°trigonal planarbent 4tetrahedral109.5°tetrahedral trigonal pyramidal bent 5 trigonal bipyramidal 90° 120° 180° trigonal bipyramidal see-sawT-shapedLinear 6octahedral 90° 180° octahedral square pyramidal square planar

10 Molecular Geometry for Propane, 1-Propanol, and Propene : :

11 Hybridization and Bond Types for Propane, 1- Propanol, and Propene : :

12 Hybrid Orbital Geometry


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