1. You'll find this website useful:

http://chemistry.about.com/science/chemistry

2. The Los Alamos National Laboratory's Chemistry Division Presents How to use the Periodic Table, Chemistry in a Nutshell, Naming the Elements in this interesting website. Click on Periodic Table to go to this link.

3. This link is from MIT's Biology Hyper textbook and I'd recommend this highly for a quick summary of the key ideas that'd you should know by clicking on the link Chapters and then clicking on the icon Chemistry Review.