This book introduces the essential concepts that form the foundation of nuclear chemistry and explains how atomic structure and nuclear processes influence chemical behaviour. It examines the theoretical principles that describe the organisation of atoms and the nature of the atomic nucleus, providing insight into the forces and interactions that operate at the subatomic level. The discussion highlights how electrons occupy defined energy regions around the nucleus and how these arrangements determine the chemical properties of elements. Attention is also given to the processes through which energy and radiation interact with matter, illustrating the physical principles that govern atomic transitions and nuclear transformations. The book further explores the scientific understanding of nuclear reactions and the ways in which nuclear processes are utilised within modern technological and energy systems. Through the integration of atomic theory, quantum interpretation, and nuclear science, the book provides a structured explanation of how matter behaves at the smallest measurable scale.

This book offers a clear academic introduction to the principles that link atomic structure with nuclear phenomena. It supports further study in nuclear chemistry, physical chemistry, and related scientific disciplines concerned with atomic interactions, energy processes, and the behaviour of matter in nuclear systems.