COVALENT BONDING1
Wave mechanics is based on the fundamental principle that electrons behave as waves
(e.g., they can be diffracted) and that consequently a wave equation can be written for
them, in the same sense that light waves, sound waves, and so on can be described by
wave equations. The equation that serves as a mathematical model for electrons is
known as the Schro¨dinger equation, which for a one-electron system is