uranium 235

noun

Definition of uranium 235

: a light isotope of uranium of mass number 235 that constitutes less than one percent of natural uranium, that when bombarded with slow neutrons undergoes rapid fission into smaller atoms with the release of neutrons and energy, and that is used in nuclear reactors and atomic bombs

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Anyone can see that fissioning uranium 235 or plutonium can be used to generate electricity. — Scientific American, "Readers Respond to the January 2018 Issue," 1 Jan. 2018

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The first known use of uranium 235 was in 1940

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uranium 235

noun

Medical Definition of uranium 235

: a light isotope of uranium of mass number 235 that when bombarded with slow neutrons undergoes rapid fission into smaller atoms with the release of neutrons and energy