FOR B.SC STUDENTS OF ALL INDIAN UNIVERSITIES, Part I: The Beginnings of Atomic Physics 2. Discharge of Electricity Through Gases 3. The Electron 4. Positive Rays 5. X-Rays L Radioactivity Part: II Fundamental Concepts of Atomic Physics 2. The Theory of Relativity 3. The Quantum Theory of Radiation 4. The Wave Nature of Matter 5. Quantum Statistics Part III: Physics of The Atom 1. The Atom Models 2. Molecular Spectra 3. Modern Problems of Radioactivity 4. Artificial Transmutation Cosmic Rays Structure and Properties of The Nucleus Bibliography Author Index