This book is part of a book series called Gcse Essentials .

This book is aimed at children in secondary school.

This book was published 1998 by Letts Educational .

Series editor Bob McDuell has spent thirty-seven years as a teacher of Chemistry and Science in a range of schools. He has authored over 160 books from Key Stage 2 to A-level and has been a Chief Examiner since 1974.