The book to present the subject matter in a unified manner. The main emphasisis to understand various elements on the basis of their position in the longform of periodic table. The topics included in this book are those which areprescribed in the syllabus for degree classes by the Indian universities. Aconcise account of each topic has been given with explanation of behaviour as the basis of electronic configurations and gradation inproperties down a group or across a period of the periodic table. In otherwords, the book gives detailed explanation of  elements, their classification,and chemical properties. A conscious effort has been made to avoid the use ofmathematics, and where it is used it is done so for the sake of clarity.