1. Lon-Capa 7th HW assignment due Friday, 11/11, by 5 pm.
5th Quiz due Sunday, 11/13 by 10 pm. It will open Friday, 11/11 at 5 pm.

2. VSEPR – General Guidelines
Draw the Lewis structure.
If the octet rule is exceeded, add electrons to the central atom.
Multiple bonds count as one direction (or one “effective pair”).
Consider the lone pairs when determining the geometry.
Consider only the atoms when determining the shape.
Polarity comes from asymmetry.

3. VSEPR Model

6. The Charge Distribution in the Carbon Dioxide Molecule

8. The Charge Distribution in the Ammonia Molecule

9. The Charge Distribution in the Water Molecule

10. Clicker Question How many of the following molecules are polar? I. COS
II. CCl4
III. XeF4
IV. SF4
a) b) c) 2 d) e) 4