The University of
Chicago Library
http://www.lib.uchicago.edu/e/index.html
The University of
Chicago Library Chemistry Electronic Journals
http://www.lib.uchicago.edu/e/chem/db/ej/
ISI Web of Knowledge
http://isi01.isiknowledge.com/portal.cgi/
The Wired Chemist
http://wulfenite.fandm.edu/wired.html
The Pictorial Periodic Table
http://chemlab.pc.maricopa.edu/periodic/periodic.html
Web Elements Periodic
Table
http://www.webelements.com/