This book offers a clear and comprehensive introduction to the structure of the atom , tracing its conceptual evolution from early philosophical ideas to the modern quantum mechanical model. It covers key milestones such as Dalton's atomic theory, Thomson's discovery of the electron, Rutherford's nuclear model, Bohr's planetary model, and the wave-particle duality that shaped Schrödinger's equation. Each concept is explained with relevant diagrams, simple analogies, and real-world examples to enhance understanding.To reinforce learning, the book includes a rich collection of multiple-choice...