The second edition of this reference book collects the most important facts about all of the chemical elements. Whilst retaining the alphabetical, easy-to-use format of the first edition, the opportunity has been taken to update information and to add a new section on environmental properties to go alongside the existing sections on chemical, physical, nuclear and electron-shell properties of the elements. All numerical data is given in SI units, and the text explains how it can be converted to other units in common use. The book concludes with a series of tables listing selected properties, both in order of the elements and in rank order of the property. An ELBS/LPBB edition is available