The Penguin Dictionary of Chemistry is the ideal source of information for students of all sciences, whatever their level, and for anyone who encounters chemical terms in the course of their everyday work. Comprehensive, packed with vital information and illustrated throughout, it has now been substantially updated to take account of the very latest developments in this key subject area. Explains chemical terms from all branches of the subject, from AAS to zwitterions Includes concise entries on elements, compounds and other substances Offers succinct accounts of important chemical operations, including industrial processes Discusses important biochemical and environmental issues