(©2004, François G. Amar, All rights reserved)

Summary for Week 13 & 14

Reading:

Finish Chapter 8

Chapter 9.1-9.6

Quiz on Wednesday, December 12

Homework problems:

Chapter 9: 9.4, 9.5, 9.9, 9.11, 9.13, 9.16, 9.19, 9.25, 9.29, 9.32, 9.36

9.39, 9.42, 9.45, 9.47, 9.53, 9.59, 9.61, 9.74, 9.78

OWL Homework

Due Sunday, December 2 at 11:59 PM: assignment for Chapter 8 of BLB

Due Sunday December 9 at 11:59 PM: assignment for Chapter 9 of BLB

Key Concepts and Equations

Molecular shapes (Chapter 9)

triangles, tetrahedrons, and other shapes

      
	VSEPR model
      
	electron pairs and repulsion
	nonbonding pairs and multiple bonds
      
	expanded valence shells (3rd row nonmetals  like P, S, Cl)
      
	more than one "central" atom   --->  organic chemistry!
      
	bond polarity and molecular dipole moment
      
	orbital overlap in covalent bonding of diatomics
         understand the difference between s (sigma) and p (pi) bonds
      
	hybridization (electron promotion and orbital mixing)
         understand how the valence of Carbon = 4 and not 2

	multiple bonds
         how do s and p bonds both exist between a single pair of atoms?
      
	molecular orbitals for diatomics (bond order)
		understand the separated atom (SA) limit and the molecular limit; 
      know how to calculate a bond order
           bond order = (#bonding electrons - #antibonding electrons)/2

construct molecular orbitals from hybridized atomic orbitals: ethylene!

paramagnetism of O₂