atomic theory


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atomic theory

n.
The physical theory of the composition of matter stating that common materials are composed of molecules, which are composed of atoms, which are composed of nuclei and electrons. It holds that the properties of composite entities, such as their structure and behavior, arise from the properties of their components.

atomic theory

n
1. (Atomic Physics) 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
2. (Atomic Physics) the current concept of the atom as an entity with a definite structure. See atomic structure
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.atomic theory - a theory of the structure of the atomatomic theory - a theory of the structure of the atom
scientific theory - a theory that explains scientific observations; "scientific theories must be falsifiable"
atomic physics, nuclear physics, nucleonics - the branch of physics that studies the internal structure of atomic nuclei
Bohr theory - (physics) a theory of atomic structure that combined Rutherford's model with the quantum theory; electrons orbiting a nucleus can only be in certain stationary energy states and light is emitted when electrons jump from one energy state to another
Rutherford atom - first modern concept of atomic structure; all of the positive charge and most of the mass of the atom are contained in a compact nucleus; a number of electrons (equal to the atomic number) occupy the rest of the volume of the atom and neutralize the positive charge
2.atomic theory - (chemistry) any theory in which all matter is composed of tiny discrete finite indivisible indestructible particles; "the ancient Greek philosophers Democritus and Epicurus held atomic theories of the universe"
theory - a well-substantiated explanation of some aspect of the natural world; an organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set of phenomena; "theories can incorporate facts and laws and tested hypotheses"; "true in fact and theory"
chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
References in periodicals archive ?
A National Endowment for the Arts Fellow and winner of the American Book Award and the High Plains Book Award, he is the author of American Masculine, American Copper, Atomic Theory 432, Balefire, Sweetclover, and Forgiveness and Power in the Age of Atrocity.
The turn of the century in 1900 was an era in which recent discoveries had been impressive: X-rays, atomic theory, electromagnetic induction, evolution, radioactivity, photography, moving pictures, the telephone, motor cars.
The book details his contributions to the development of atomic theory, his work with scientists Einstein and Heisenberg, his move to the US in 1927, and his role in the Alsos Mission of the US Department of Defense to search for evidence of atomic bomb research in Germany after the war.
In physics, the ancient Greek conception of the world consisting of five elements was supplanted by Dalton's atomic theory, which was later modified by Rutherford, Bohr, Schrodinger, etc., each updating truth as more information became available.
The main approaches used to describe the small-scale effect in the analysis of nanostructures include nonlocal continuum mechanics and the atomic theory of lattice dynamics [1].
They will have heard of atomic theory, which no one has seriously doubted for over a century.
Newtonian mechanics, James Clerk Maxwell's equations for electromagnetism, Einstein's relativity, Bohr's atomic theory, Turing's universal computer, Schrodinger's quantum wave function, Feynman's diagram: all these and more streamed into the phone you hold in your hand.
"Although everyone 'knows' that science must be publicly funded, everyone also knows that nearly all the great leaps of classical science--Newtonian physics, relativity, atomic theory, thermodynamics, electromagnetism, genetics, and many others--occurred with no government aid whatever."
The Importance of Atomic Theory. 978-1-60152-786-8.
In other words, Epicureanism was based on atomic theory, which was in his time scientifically unprovable, and was not proven by science for almost 2,000 years.
It is to be further emphasised that Isaac Newton acknowledged that ancient Egyptians were acquainted with gravitation, heliocentricity, and atomic theory. This is quite apparent from Newton's book, Principia Mathematica, written in Latin, the language of intellectual discourses then.
In the late nineteenth century, Gorlaeus was rediscovered by chemists because his works advocated an atomic theory of matter.