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Bohr atom

noun, Physics.
1.
See under Bohr theory.
Origin
1920-1925
1920-25; after N. Bohr
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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bohr-atom in Culture
Bohr atom [(bawr)]

The simplest modern picture of the structure of the atom, according to which electrons move in orbits around the nucleus. The electron's orbits can exist only at certain well-defined distances from the nucleus. When an electron changes orbits, it does so in a sudden quantum leap. The energy difference between the initial and final orbit is emitted by the atom in bundles of electromagnetic radiation called photons.

Note: The Bohr atom is named after the twentieth-century Danish physicist Niels Bohr.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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