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Chemicool was created by David D. Hsu. of the Massachusetts Institute of Technology in 1996. Chemicool went online in 1996 and since then has been trying to help out anyone involved in chemistry.
A resource for students who are struggling with science concepts.
The Periodic Table of Elements
Tables charting the chemical elements have been around since the 19th century - but this modern version has a short video about each one.