The failure of classical physics and the development of quantum mechanics. Matter waves. de Broglies hypothetis. Plancks constant. Wave packets. The Uncertainty Principle. The Schrodinger equation. Particle in a box. Boundary conditions. Wave functions. The step potential. Eigenvalues. Eigenfunctions. Operators. Expectation values. Commuting observables. Hydrogen atom. Energy levels of the hydrogen atom.References:1. Scherrer, R. (2006). Quantum Mechanics (International Edition). Pearson.2. Griffiths, D.J. (1994). Introduction to Quantum Mechanics (International Edition). Prentice Hall.3. Eisberg, R., Resnick, R. (1985). Quatum Physics (2nd Edition). John Wiley & Sons.