Topics: atomic structure, atomic models, charge quantization, mass spectra, Bohr’s model of an atom, Hydrogen Spectra, electronic configuration, Magnetic Moment, Magnetic Dipole Moment, Electron Spin, Pauli’s Exclusive Principle, X – Spectra, Wave–Particle Duality, Radioactivity, binding energy of nuclei, Nuclear Structure, Nuclear Stability, Radioactivity, Radioactive series, Accelerators, detectors