atomic theory

Definitions

  • WordNet 3.6
    • n 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"
    • n atomic theory a theory of the structure of the atom
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Webster's Revised Unabridged Dictionary
    • Atomic theory etc. See under Atomic Binary, etc.
    • Atomic theory (Chem) teaches that chemical combinations take place between the supposed ultimate particles or atoms of bodies, in some simple ratio, as of one to one, two to three, or some other, always expressible in whole numbers.
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Chambers's Twentieth Century Dictionary
    • Atomic theory the hypothesis that all chemical combinations take place between the ultimate particles of bodies, uniting each atom to atom, or in proportions expressed by some simple multiple of the number of atoms
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Etymology

Chambers's Twentieth Century Dictionary
Gr. atomosa, not, temnein, tamein, to cut. See Atom.

Usage

In literature:

Such was the foundation of the atomic theory of Democritus.
"The World's Greatest Books--Volume 14--Philosophy and Economics" by Various
They tried to elucidate it by means of the atomic theory, which fairly swamped them.
"Bouvard and Pécuchet" by Gustave Flaubert
He developed the atomic theory of Leucippus.
"The Apologia and Florida of Apuleius of Madaura" by Lucius Apuleius
A review of current theories concerning Atoms, Apes, and Men.
"Life of Charles Darwin" by G. T. (George Thomas) Bettany
Interaction and the Atomic Theory.
"Introduction to the Science of Sociology" by Robert E. Park
But Epicurus seems to have worked out the Atomic Theory more in detail, as we have it expounded in Lucretius' magnificent poem.
"Five Stages of Greek Religion" by Gilbert Murray
Then he became a member of the St. Petersburg Academy of Sciences and broached his famous atomic theory.
"The Scrap Book. Volume 1, No. 2" by Various
It is new in the sense in which Schwann's Cell Theory was new to Physiology, or Dalton's Atomic Theory to Chemistry.
"Malplaquet" by Hilaire Belloc
Different kinds of matter must be explained, in any atomic theory, by the shape, size, and position of the atoms of which they are composed.
"A Critical History of Greek Philosophy" by W. T. Stace
But logical atomism was implicit even in this theory.
"Creative Intelligence" by John Dewey, Addison W. Moore, Harold Chapman Brown, George H. Mead, Boyd H. Bode, Henry Waldgrave, Stuart James, Hayden Tufts, Horace M. Kallen
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In news:

The new evidence, challenging a dogma of science that has stood since Albert Einstein published his theory of relativity in 1905, appeared to confirm that sub-atomic particles called neutrinos could travel fractions of a second faster.
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In science:

The following tasks are implemented in QUIP: • Given a theory T , a set H of variables, and an atom p.
QUIP - A Tool for Computing Nonmonotonic Reasoning Tasks
Formulae Lφ are viewed as propositional variables, which are called modal atoms. A stable expansion of an autoepistemic theory T ⊆ LL is a set E ⊆ LL such that E = T h(T ∪ {Lφ | φ ∈ E ) ∪ {¬Lφ | φ /∈ E }), where T h(·) is the classical consequence operator with respect to the extended language LL .
QUIP - A Tool for Computing Nonmonotonic Reasoning Tasks
Within less than 5 years we had the quantum photoelectric effect, the special theory of relativity, and within 12 years the Bohr quantum theory of the atom.
Cosmic Dust in the 21st Century
But in spite of this, these devices are excluded from the world of atomic constituents that are described in the mathematical language of quantum theory.
Quantum theory and the role of mind in nature
This theory explained with greater precision than ever before the position of the spectral lines for the hydrogen atom.
The categorical theory of relations and quantizations
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