Student Dictionary

One entry found for atomic theory.
Main Entry: atomic theory
Function: noun
1 : a theory of the nature of matter: all material substances consist of very tiny particles or atoms of not really many 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 saying that the atom consists essentially of a small positively charged heavy nucleus in relation to a large arrangement of electrons that surround the nucleus

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