These handwritten notes are based on lectures delivered during the Spring semesters of 2012 and 2016 in the advanced undergraduate courses PHYS401 and PHYS402 (Quantum Physics I & II) at the University of Maryland, College Park. The primary objective of these courses is to introduce students to the canonical elements of quantum mechanics: wave-particle duality, the Schrodinger equation, bound states and scattering in one dimension, central potentials and the hydrogen atom, Dirac formalism including quantum states as vectors in Hilbert space, spin and spectroscopy, multi-particle systems, the periodic table, and several approximation methods such as perturbation theory, variational principle, etc.