Uranium-235
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.
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- Uranium-238
noun, Chemistry. 1. the radioactive uranium isotope having a mass number 238, comprising 99.28 percent of natural uranium: used chiefly in nuclear reactors as a source of the fissionable isotope plutonium 239.
- Uranium-239
noun, Chemistry. 1. the uranium isotope with a mass number 239. It is artificially produced by the neutron bombardment of uranium 238.
- Uranium-dating
noun 1. a method of dating archaeological or geological specimens by determining the decay activity of the uranium in a given sample.
- Uranium-dioxide
noun, Chemistry. 1. a black, crystalline compound, UO 2 , insoluble in water, used in nuclear fuel rods, in ceramics, and pigments.
- Uranium-hexafluoride
noun, Chemistry. 1. a colorless, water-insoluble, crystalline, volatile solid, UF 6 , used in its gaseous state in separating uranium 235 from uranium. uranium hexafluoride /ˌhɛksəˈflʊəˌraɪd/ noun 1. a compound used in the process of uranium enrichment that produces fissile material for nuclear reactors and nuclear weapons. Formula: UF6