The localized electron model uses Lewis structures to predict molecular shapes. Lewis structures show the bonds and lone pair electrons of a molecule. A line is used to represent each bond and dots are used to represent the electrons. This Powerpoint presentation explains how to determine the correct Lewis structure for a molecule. It examines exceptions to the octet rule, resonance and formal charge as it applies to drawing Lewis structures.
Free worksheets on this topic are available on my website at http://www.evanschemistrycorner.com