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uranium 235

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uranium 235

 
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–noun Chemistry.
the radioactive uranium isotope having a mass number of 235, comprising 0.715 percent of natural uranium. When bombarded with neutrons it undergoes fission with the release of energy.
Also called U-235, U 235, actinouranium.

Origin:
1935–40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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uranium 235  
n.  The uranium isotope with mass number 235 and half-life 7.04 × 108 years, fissionable with slow neutrons and capable in a critical mass of sustaining a chain reaction that can proceed explosively with appropriate mechanical arrangements.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: uranium 235
Function: noun
: a light isotope of uranium of mass number 235 that when bombarded with slow neutrons undergoes rapid fission into smaller atomswith the release of neutrons and atomic energy
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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