Periodic Table/Elements

http://www.webelements.com/  (has voice pronunciation of the elements)
http://ull.chemistry.uakron.edu/periodic_table/table.html  (gives only the statistics of the element)
http://pearl1.lanl.gov/periodic/default.htm  (gives history, source, etc. of the element)
http://chemserv.bc.edu/web_elements/web-elements-home.html  (good but advanced)