atomic theory


noun

Physics, Chemistry. any of several theories describing the structure, behavior, and other properties of the atom and its component parts.
Philosophy. atomism(def 1).

Origin of atomic theory

First recorded in 1840–50

British Dictionary definitions for atomic theory

atomic theory

noun

any theory in which matter is regarded as consisting of atoms, esp that proposed by John Dalton postulating that elements are composed of atoms that can combine in definite proportions to form compounds
the current concept of the atom as an entity with a definite structure See atomic structure