• Chemicool Periodic Table - lookup info on any element
• Eric's Treasure Troves of Science - searchable information on astronomy, biography, books, chemistry, life, mathematics, music, and physics
  • Chemistry
• Web Elements (Professional Edition) (Scholar Edition) - an interactive Periodic Table of the Elements which includes the history, significance, and sources of all of the elements

E-mail to stark @ astro.psu.edu