Chemistry is the study of matter and energy and the interactions between them. Get facts for the elements in the periodic table. Find chemistry demonstrations and experiments and science fair projects. Get chemistry homework help with worked example problems and a glossary. Grow your own crystals. Browse molecular structures. Find articles on chemistry. Find out how things work and get answers to common science questions.

Compound libraries, Screening compounds, Fragment libraries, Fragments, Targeted Libraries, Focused Libraries, Building Blocks, New Chemical Entities, Active Intermediates, Hit-to-lead optimization, Custom synthesis, Custom Libraries, Computational Chemistry, Medicinal Chemistry, CRO, Custom Research Organizations

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The Organic Chemistry Portal offers an overview of recent topics, interesting reactions and information on important chemicals for organic chemists.

Chemistry: Foundations and Applications: A-Ar, Ar-Bo, Bo-Ce, Ce-Co, Co-Di, Di-Fa, Fe-Ge, Ge-Hy, Hy-Kr, Kr-Ma, Ma-Na, Ne-Nu, Ny-Pi, Pl-Pr, Pr-Ro, Ru-Sp, St-Te, Te-Va, and Va-Z

Metkinen Chemistry provides unique reagents for DNA and RNA synthesis.