atomic theory

atomic theory
noun Date: 1814 1. a theory of the nature of matter: all material substances are composed of minute particles or atoms of a comparatively small number of kinds and all the atoms of the same kind are uniform in size, weight, and other properties 2. any of several theories of the structure of the atom; especially one based on experimentation and theoretical considerations holding that the atom is composed essentially of a small positively charged comparatively heavy nucleus surrounded by a comparatively large arrangement of electrons

New Collegiate Dictionary. 2001.

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  • atomic theory — n 1) a theory of the nature of matter: all material substances are composed of minute particles or atoms of a comparatively small number of kinds and all the atoms of the same kind are uniform in size, weight, and other properties called also… …   Medical dictionary

  • atomic theory — n. the theory that all material objects and substances are composed of atoms, and that various phenomena are explained by the properties and interactions of these atoms …   English World dictionary

  • atomic theory — 1. Physics, Chem. any of several theories describing the structure, behavior, and other properties of the atom and its component parts. 2. Philos. atomism (def. 1). [1840 50] * * * ▪ physics       ancient philosophical speculation that all things …   Universalium

  • atomic theory — noun 1. a theory of the structure of the atom • Hypernyms: ↑scientific theory • Hyponyms: ↑Bohr theory, ↑Rutherford atom • Part Holonyms: ↑nuclear physics, ↑atomic physics, ↑ …   Useful english dictionary

  • atomic theory — /əˌtɒmɪk ˈθɪəri/ (say uh.tomik thearree) noun 1. Physics, Chemistry the theory of the atom having a complex internal structure and electrical properties. 2. Physics the mathematical description of the behaviour of the electrons in the atom about… …  

  • atomic theory — n. theory explaining the structure of the atom; theory which asserts that all matter is comprised of atoms …   English contemporary dictionary

  • atomic theory — noun a) The theory that all gross matter is composed of atoms. b) Any of several theories that explain the structure of the atom, and of subatomic particles …   Wiktionary

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