1.
Abbreviations of Chemical Compounds
A searchable index of chemical compound abbreviations. Results include an expansion of the abbreviation plus complete molecular formula of the chemical compound.
2. ATSDR ToxFAQs: Hazardous Substance Fact Sheets
A searchable database of summaries about hazardous substances and the most frequently asked questions about the effects of these substances compiled by the Agency for Toxic Substances and Disease Registry. Includes lay-person information about specific chemicals ranging from arsenic and asbestos to xylene.
3. Chemicals in the Environment OPPT Chemical Fact Sheets
A collection of indexed fact sheets on toxic chemicals. For each chemical listed, there is a document with frequently asked questions about the chemical and a summary document about the chemical, itself.
4. Chemistry.org
This is a good place to find full text journal articles; a useful site for upper level college students and above.
5. General Chemistry Online
A very useful site for the general chemistry student at both the high school and the college level with links of use to the practicing chemist.
6. WebElements
WebElements aims to be a high quality source of information on the WWW relating to the periodic table.
7. Wired Chemist
This site contains many resources including: Data Tables, Molecular Images, and Resources on the Web. The Introduction to Chemistry section would be particularly helpful to a beginning student.