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• The Thomson model, The Rutherford model, Alpha-Particle Scattering
• Nuclear dimensions, Electron orbits, Failure of classical Physics
• Atomic spectra and its types, Atomic spectra of hydrogen atom , The Bohr atom
• Energy levels and spectra , Atomic excitation and its mechanism, Frank Hertz experiment
• Nuclear Motion and Reduced Mass, The Correspondence principle,Quantum Theory of the Hydrogen Atom, Quantum numbers, Total Quantum numbers, Orbital Quantum number
• Magnetic Quantum Number, Spin-orbit interaction, Exclusion principle
• Electron configuration in many electron-atoms, Hund’s rules, Coupling of angular momenta, LS-coupling, jj-coupling
• Origin of Spectral lines, Selection Rules, One electron Spectra,Two-electron Spectra, Relative intensities in a multiplet, Xray spectra
• Atoms in Magnetic and Electric fields: Space quantization, Magnetic moment, electron probability density
• Zeeman Effect, Paschen-Back effect, Stark effect
• The chemical bond, Molecular formation, Electron sharing
• The H2 molecular ion, The linear combination of atomic orbits method, The H2 molecule
• The Ionic bond, Theories of Bonding
• The valence bond approach, Frankcondon principle