• Basic structure of an atom and atomic models. • The atom, its structure and charge quantization. • Mass spectra. • Atomic models. • Bohr’s model of an atom. • Hydrogen spectra. • Structure of the nucleus and electronic configuration. • Magnetic moment (or magnetic dipole moment). • Electron spin. • Pauli’s exclusive principle. • X - Spectra. • Wave – particle duality. • Radioactivity and binding energy of nuclei. • Nuclear structure. • Nuclear stability. • Radioactivity. • Radioactive series. • Accelerators and detectors.