The Chemicool Periodic Table site enables you to learn more about individual elements by clicking on images within the periodic table. An easy-to-use and informative site.
WebElements, by Mark Winter of the University of Sheffield in England, is another site with a periodic table and abundant information about the elements and chemistry.
Acids and Bases
(http://library.advanced.org/3659/acidbase/)
Acids and Bases is part of the CHE Mystery Page intended for high school students, but useful for anyone needing to review. Use this site to review the basics about acids and bases, electrolytes, acid-base reactions, and the pH scale.
Review Organic Chemistry to help you understand the topics presented in Chapter 2 of your text. Click on carbohydrates, lipids, proteins, or nucleic acids for help in understanding the molecules that are central to the functioning of the human body.