Periodic Table - ChemicoolA commercial site, Chemicool was the brainchild of David D. Hsu of the Massachusetts Institute of Technology. The data for this site was acquired with help from the following people: Cabrol D.; Moore J. W and Kotz J. C. Additionally, the Perkin-Elmer Periodic Table v2.02g was used for Atomic mass, density, volume, group, heat of fusion, heat of vaporization, specific heat, and shells.