SymbolUA heavy, silvery-white, highly toxic, radioactive metallic element of the actinide series. It occurs in several minerals and ores, such as pitchblende. Uranium is used as a fuel for nuclear reactors to generate electricity.Atomic number92. SeePeriodic Table. ...
2 Atoms with the same number of protons but different numbers of neutrons are called isotopes. U234 has 92 protons and 142 neutrons (and its mass number is 92+142=234), whereas U235 and U238 have 143 and 146 neutrons, respectively. 3 United States Nuclear Regulatory...
MD, MPH, Arthur C. Upton MD, in Medical Effects of Ionizing Radiation (Third Edition), 2008 URANIUM General Uranium is a silvery, heavy metal that is ductile and malleable. Uranium is element number 92 and occurs only in radioactive form. Natural uranium is a mixture of three isotopes: ...
uranium (U), radioactive chemical element of the actinoid series of the periodic table, atomic number 92. It is an important nuclear fuel. Uranium constitutes about two parts per million of Earth’s crust. Some important uranium minerals are pitchblende (impure U3O8), uraninite (UO2), carno...
(143 neutrons). All isotopes are unstable and uranium is weakly radioactive. Uranium has the second highest atomic weight of the naturally occurring elements, lighter only than plutonium-244.[3] Its density is about 70% higher than that of lead, but not as dense as gold or tungsten. It ...
Neutron nuclear data of 233U have been evaluated in the energy range from 10-5 eV to 20 MeV. Evaluated quantities are the total, fission, capture, elastic and inelastic scattering, (n,2n) and (n,3n) reaction cross sections, and the average numbers of prompt and delayed neutrons emitted ...
Twitter Google Share on Facebook uranium-238 Also found in:Thesaurus,Acronyms,Wikipedia. n. The most common isotope of uranium, having mass number 238 and half-life 4.47 × 109years, nonfissionable but may be irradiated with neutrons to produce fissionable plutonium-239. ...
by both controlling the number of stray neutrons and regulating the temperature, as is done in the core of a nuclear reactor — you get useful energy. racks of these nuclei crash together, creating a hot glowing pile of radioactive material. if you pump water past the material, the water ...
(which has 143 neutrons). Uranium has the highest atomic weight of the primordially occurring elements. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. It occurs naturally in low concentrations of a few parts per million in soil, rock ...
92. Uranium-238 is the most common isotope which means it has the same chemical properties and atomic number but differs in mass. Isotopes have the same number of protons and electrons, but a different number of neutrons. Uranium-238 has 146 neutrons while Uranium-235 has 143 neutrons. ...