Question: how do chemists use systems and order in their work

title: History of chemistry
text: In 1926 at the age of 39 , Austrian theoretical physicist Erwin Schrödinger produced the papers that gave the foundations of quantum wave mechanics . In those papers he described his partial differential equation that is the basic equation of quantum mechanics and bears the same relation to the mechanics of the atom as Newton 's equations of motion bear to planetary astronomy . Adopting a proposal made by Louis de Broglie in 1924 that particles of matter have a dual nature and in some situations act like waves , Schrödinger introduced a theory describing the behaviour of such a system by a wave equation that is now known as the Schrödinger equation . The solutions to Schrödinger 's equation , unlike the solutions to Newton 's equations , are wave functions that can only be related to the probable occurrence of physical events . The readily visualized sequence of events of the planetary orbits of Newton is , in quantum mechanics , replaced by the more abstract notion of probability . ( This aspect of the quantum theory made Schrödinger and several other physicists profoundly unhappy , and he devoted much of his later life to formulating philosophical objections to the generally accepted interpretation of the theory that he had done so much to create . )