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uranium 235

American  

noun

Chemistry.
  1. 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.


Etymology

Origin of uranium 235

First recorded in 1935–40

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

The more uranium 235 your nuclear fuel has, the smaller you can make your reactor—or your bomb, which is why the material is subject to such strict regulations.

From Scientific American Jan. 27, 2022

This is especially true if your fission system relies on highly enriched uranium—that is, uranium composed of 20 percent or more of the fissile isotope uranium 235.

From Scientific American Jan. 27, 2022

The deal allows research, which now has improved their breakout time down to a day or two, by means of rapid centrifuge enrichment of uranium 235.

From New York Times Mar. 21, 2018

Lawmakers set the budget at 235 million yen after uranium 235, a fuel used in atomic reactors, according to his autobiography.

From BusinessWeek Oct. 20, 2011

Its large size makes the nucleus of uranium 235 unstable—to break it apart, all nuclear operators need to do is add some loose neutrons to the mix.

From "Meltdown" by Deirdre Langeland

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