Chemistry

This subcategory gathers theories belonging to chemistry: the laws and models describing how atoms and molecules combine, react and behave, including atomic and bonding theories, the gas laws, equilibrium and reaction-rate theories, and the historical theories that chemistry discarded on the way to its modern form, such as phlogiston theory. A theory placed here explains matter's composition, structure or transformation at the chemical level, distinct from the underlying physics of matter or a living system's chemistry.