Visual Elements: The Noble Gases Overview, general properties, and chemical data for the group. http://www.chemsoc.org/viselements/pages/data/intro_groupviii_data.html

Chem4Kids.com: Inert Gases Overview of the group aimed at children. http://www.chem4kids.com/files/elem_inertgas.html

Platinum Today Platinum metals prices, applications and sources, supply and demand analysis, review of scientific research. http://www.platinum.matthey.com/