uranium

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Related to Uranium compounds: Triuranium octaoxide

uranium

 [u-ra´ne-um]
a chemical element, atomic number 92, atomic weight 238.03, symbol U. (See Appendix 6.)

u·ra·ni·um (U),

(yū-rā'nē-ŭm),
A radioactive metallic element, atomic no. 92, atomic wt. 238.0289, occurring mainly in pitchblende and notable for its two isotopes: 238U and 235U (99.2745% and 0.720%, respectively, the rest being made up by 234U), 235U being the first substance ever shown capable of supporting a self-sustaining chain reaction.
[G. myth. character, Uranus]

u·ra·ni·um

(U) (yŭr-ā'nē-ŭm)
A radioactive metallic element, atomic no. 92, atomic wt. 238.0289, occurring mainly in pitchblende and notable for its two isotopes: 238U and 235U (99.2745% and 0.720%, respectively, the rest being made up by 234U), 235U being the first substance ever shown capable of supporting a self-sustaining chain reaction.
[G. myth. character, Uranus]
References in periodicals archive ?
Uranyl (UO2 + 2) ions, such as from uranium trioxide or uranyl nitrate and other hexavalent uranium compounds, have been shown to cause birth defects and immune system damage in laboratory animals.
These new uranium reagents display versatile reaction chemistry and can he used to prepare uranium compounds and materials at industrial-sized scales.
As it turned out, there were uranium compounds that the scarifier broke up.
According to the leading theory, deposits of the radioactive metal formed when water running off vegetation-free landmasses carried uranium compounds to the delta of an ancient African river.
Suddenly, Germany possessed a heavy-water factory in Norway; thousands of tons of high-grade uranium compounds from Belgium; a cyclotron nearing completion in France; a body of chemists, physicists, and engineers; and the greatest chemical engineering industry in the world.
This was then transferred back to Libya in the form of uranium compounds that could be used in the uranium enrichment process.
Workers at the JCO Tokai plant set off the nation's worst nuclear accident as they were processing uranium compounds to be used to fuel an experimental fast-breeder reactor for the government's Power Reactor and Nuclear Fuel Development Corp.
* Indigenous production as well as overt and covert procurement of natural uranium compounds for use in an atom bomb