This lecture covers the advanced concepts of general chemistry, focusing on the quantization of energy levels in atoms, the dual wave-particle nature of particles, and the uncertainty principle. Topics include the quantification of energy exchange between matter and light, the color characteristic of elements, the wave-particle duality of particles, and the probability density of electrons. The lecture also delves into the principles of quantum mechanics, such as the quantization of energy levels, the wavefunction, and the distribution of electron density. Through examples like the particle in a box, the lecture illustrates the probabilistic nature of quantum mechanics and the behavior of particles in confined spaces.