Fully revised and updated, this fourth edition is the ideal work of reference for students of chemistry, either at school or at university. Containing many new entries, and now with biographies of key scientists, it covers all aspects of chemistry, including physical chemistry and biochemistry. -- Over 4,000 clear and concise entries -- New entries include aflatoxin, computational chemistry, dendritic polymer, and molecular chaperone -- Feature articles on important topics -- Chronologies chart the discoveries in the main fields of the subject 'an old favourite. It should be in every classroom and library the reader is drawn inevitably from one entry to the next merely to satisfy curiosity' School Science Review