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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.

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

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

Compared weight-by-weight, uranium 235 delivers a million times more energy than coal, which itself already represents chemical energy in a highly concentrated form.

From Scientific American • Jan. 20, 2012

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

It becomes less likely that a neutron will strike a uranium 235 nucleus, and the fuel can no longer sustain a chain reaction.

From "Meltdown" by Deirdre Langeland

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