Elements of Nuclear Chemistry designed to cater to the needs of both graduate as well as post-graduate students in chemistry, serves to present forth a manual which makes clear the principles, concepts and practices behind advanced nuclear chemistry. This book will be useful for the Engineering and Science graduates, postgraduates and researchers of various universities in India and abroad. This book concentrates on the techniques concerned with the detection and measurement of radioactivity. In order to appreciate the subject Nucleus, Atomic concepts, Protons and neutrons, Pauli exclusion principle, Quantum number, Photophysical radiationless transitions, Quantized atom, Effects of ionizing radiation, Nuclear fuel cycle, Reaction stoichiometry, Interaction of light and matter are dealt with appropriately. The main forces is on giving students both a theoretical as well practical understanding of how nuclear chemistry works, and seeks to make them more critical and refined in their comprehension of the subject. With illustrated diagrams aiding in visual comprehension, the text should serve as an insightful read for all.