Air and Water Chemistry for Kids ChemWeb Chemical Abstract Service Chemical Elements Chemical Guide - Chemical Resources Chemical Information Sources Chemical Safety - NIOSH Chemicool Chemistry Activities Chemistry Behind Cleaning Chemistry Jokes Chemistry Links Chemistry Online Chemistry Teaching Resources Chemistry Web Resources Common Chemistry Delights of Chemistry Dihydrogen Monoxide eMolecules Erics Chemistry Handbook of Chemistry & Physics List of Compounds NIST Chemistry WebBook Nomenclature of Organic Compounds Oxford Chemical Dictionary Periodic Table of the Elements Photo Periodic Table Posters Process Tools and Conversion Factors Science Jokes Sigma-Aldrich The Catalyst! Visual Elements WebElements Wolfram Alpha - computations Wolfram Mathematica World of Chemistry