Chap 3: Simple Bonding Theory

Goals: 3.1

Lewis Electron-Dot Diagrams

• Draw Lewis structures
• Using concepts of formal charge, electronegativity, and the octet rule, predict the relative energies of a selection of resonance structures
• Draw resonance hybrids

Goals: 3.2

Valance Shell Electron Pair Repulsion Theory

• Describe the basis for VSEPR theory
• Determine the shapes of molecules through molecules with a steric number of 6
• Using concepts like relative strength of lone pair-lone pair, bonding pair-lone pair, and bonding pair-bonding pair repulsion, the extra repulsion caused by multiple bonds, the reduced electron pair repulsion experienced by the bonding pairs of highly electronegative atoms explain why molecules have a certain geometry
• Describe the basis for the ligand close packing model
• Predict the polarity of molecules: describe the factors that go into such a prediction, and describe when and why we may have difficulties predicting the polarity of some molecules