The Schrödinger wave equation is a fundamental equation of quantum mechanics that describes the wave function of a quantum-mechanical system. It is a linear partial differential equation that gives the evolution over time of a wave function, which is the quantum-mechanical characterization of an isolated physical system. The Schrödinger equation is the quantum counterpart of Newtons second law in classical mechanics, which makes a mathematical prediction as to what path a given physical system will take over time. The Schrödinger equation provides a way to calculate the wave function of a system and how it changes dynamically in time. The equation is used to solve problems based on the atomic structure of matter in Chemistry and Physics. The Schrödinger equation is also used to describe the behavior of a particle in a field of force or the change of a physical quantity over time. The equation predicts that wave functions can form standing waves, called stationary states, which are particularly important as their individual study later simplifies the task of solving the time-dependent Schrödinger equation for any state. The Schrödinger equation is a differential equation that is widely used in Chemistry and Physics to solve problems based on the atomic structure of matter.