Focuses on localized bonds and the overlap of atomic orbitals (hybridization).
He stared at the thick, spiral-bound stack of papers on the desk. The label on the cover was simple, typed in a monospaced font: Lecture Notes: Quantum Chemistry II – Dr. Aris Thorne .
States that any trial wave function will have an energy higher than or equal to the true ground-state energy. This allows us to "guess" the best possible wave function.