This book is helpful to understand basics of Inorganic Chemistry. It is especially helpful for the beginners. This work will help them understand basics related to Development of Periodic Table for example Dobereiner law, New land's law, Lothar Meyer's periodic classification, Mendeleev's classification and modern periodic law. The book contains basic concepts related to classification that includes all laws, merits and demerits of law and all the aspects related to elemental classification, especially needful for those who begin their way in studying Inorganic Chemistry.