Polar molecules have an unequal charge distribution. The only way that can happen is for a molecule to have polar bonds AND an asymmetrical shape. Bond type is determined by electronegativity difference. Charge distribution is a function of shape. This Powerpoint presentation shows students how to approximate the shape of the molecule using electron dot diagrams. The electron dot diagrams are used to evaluate the charge distribution. This Powerpoint is designed for students who do NOT have a working knowledge of Lewis structures and VSEPR.
Worksheets on this topic are available on my website at http://www.evanschemistrycorner.com.