The second edition of GCSE Chemistry has been produced to reflect the revised GCSE specifications and to ensure that it is thoroughly up to date. In particular: the development of scientific ideas has been expanded with additional material on the discovery of the periodic table and theories of acids and bases; further information has been provided on topics such as instrumental techniques for identifying elements and compounds, the effects of plate tectonics, colloids and carboxylic acids, specifically aspirin, ascorbic acid and citric acid; there is additional material on the technological...