A heavy, naturally radioactive, metallic element of atomic number 92. Its two principally occurring isotopes are uranium-235 and uranium-238. Uranium-235 is indispensable to the nuclear industry because it is the only isotope existing in nature to any appreciable extent that is fissionable by thermal neutrons. Uranium-238 is also important, because it absorbs neutrons to produce a radioactive isotope that subsequently decays to plutonium-239, an isotope that also is fissionable by thermal neutrons.
A radioactive element with the atomic number 92 and, as found in natural ores, an average atomic weight of 238. The two principal natural isotopes are uranium-235 (0.7 percent of natural uranium), which is fissionable, and uranium-238 (99.3 percent of natural uranium), which is fertile.
A radioactive metallic element found naturally only in combination with other substances. Uranium 238 (U-238) is the most common form, but about 0.7 percent of natural uranium is present as U-235, which is the important fissionable component in work with atomic enemy. Uranium in natural water exists as anionic complexes UO(CO) and UO(CO).
A heavy, slightly radioactive metallic element with atomic number 92. As found in nature, it is a mixture of the isotopes U-235 (0.7%) and U-238 (99.3%). The artificially produced U-233 and the naturally occurring U-235 are fissile. U-238 is fertile.
a naturally occurring radioactive element whose principal isotopes are Uranium-238 and Uranium-235. Natural uranium is a hard silvery-white shiny metallic ore that contains a minute amount of Uranium-234. Uranium return to: [] [ Click "BackButton" for previous location
A naturally occurring radioactive element with the atomic number 92, and an atomic weight of approximately 238. Two principle isotopes are uranium-235 (0.7 percent of natural uranium), which is fissile, and uranium-238 (99.3 percent of natural uranium), which is fissile only by fast neutrons. The half-life is 7.04 x 108years.
Year discovered: 1789 Atomic No.: 92 Symbol: U Atomic weight: 238.03 Melting point: 1,132.3º C Uranium is the heaviest of the natural elements. Natural uranium contains 99.3-percent isotope 238 and 0.7-percent isotope 235. For nuclear reactor use, isotope 235 is ideal since it is fissionable. Isotope 238 is considered fertile because it can be converted to fissionable plutonium. Silver in color, uranium is fluorescent in many of its compounds. It may spark when struck with a tool and self-ignite in powder form.
A heavy, silver-white, radioactive metal.
naturally occurring radioactive chemical element found in the earths crust. Used as fuel at nuclear power plants. See enriched uranium.
A naturally occurring radioactive material used to produce fuel for nuclear power plants.
a heavy, radioactive metal (atomic number 92) used in the explosion of nuclear weapons (especially one isotope, U-235).
See table. ... : is simply the most abundant isotope of uranium, 238U. ... II: an isotope of uranium produced in uranium decay, namely 234U (half-life = 2.5x105 y). [Soddy , , & ] ... : There were two uranium X produced in uranium decay. Uranium X1 (simply uranium X before the discovery of uranium X2) was an isotope of thorium, namely 234Th (half-life = 24 d); uranium X2 was an isotope of protactinium 234Pa. [Crookes; Rutherford; Soddy , , & ] ... yellow: sodium uranate, Na2UO4, a pigment used in glass and ceramics
Hard, grey radioactive metal.
Naturally occurring radioactive metal. Exposure to uranium is a very rare cause of lung cancer.
A white malleable metal which is softer than steel. Its specific gravity is 18.7, it melts at a temperature of 2400oC. Chemical symbol for Vanadium.
A chemical element with atomic number 92. Uranium was discovered in 1789 by Martin Heinrich Klaproth though it was not until 1842 that it was successfully isolated by Eugéne-Melchior Péligot. The name uranium is derived from the planet Uranus. Symbol: .
A metallic element used in nuclear bombs, with many radioactive and unstable istopes.
A naturally radioactive and very dense element. Mine Uranium contains 0.7 percent of the isotope Uranium-235, needed for fission. Uranium-235 is the principal nuclear fuel material used in today's nuclear power reactors.
A naturally occurring radioactive element whose principle isotopes are U-238 and U-235. The primary use for uranium is as a source of fuel for nuclear power reactors. When highly enriched by increasing the percentage of U-235 isotopes, it may also be used in nuclear weapons.
One of the heavy metallic elements that are radioactive.
a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons
a naturally occurring radioactive element whose principal isotopes are uranium-238 (U-238) and uranium-235 (U-235). Natural uranium is a hard, silvery-white, shiny metallic ore that contains a minute amount of uranium-234 (U-234).
A heavy, naturally radioactive, metallic element (atomic number 92). Its two principally occurring isotopes are 235U and 238U. The isotope 235U is indispensable to the nuclear industry because it is the only isotope existing in nature to any appreciable extent that is fissionable by thermal neutrons. The isotope 238U is also important because it absorbs neutrons to produce a radioactive isotope that subsequently decays to the isotope 239Pu, which also is fissionable by thermal neutrons.
A heavy (average atomic mass of about 238 atomic mass units), silvery-white metal with 14 radioactive isotopes. One of the isotopes, uranium-235, is most commonly used as fuel for nuclear fission and another, uranium-238, is transformed into fissionable plutonium-239 following its capture of a neutron in a nuclear reactor.
MS = Uranium. A radioactive element of the actinide series of metals. It has an atomic symbol U, atomic number 92, and atomic weight 238.03. U-235 is used as the fissionable fuel in nuclear weapons and as fuel in nuclear power reactors. AN = naturally radioactive; IM UI = D014501
A chemical element, U, that has an atomic number 92. It reactive with nearly all nonmetals and is used as fuel for nuclear reactors.
A metallic element that is naturally occurring with three main radioactive isotopes (i.e., U-234, U-235, and U-238). Uranium is carcinogenic and can also cause damage to the kidney. Total uranium is regulated by the US Environmental Protection Agency.
The basic material for nuclear technology. It is a slightly radioactive naturally occurring heavy metal that is more dense than lead. Uranium is 40 times more common than silver.
A metallic element that is used as nuclear fuel and is highly toxic and radioactive. Exposure to radiation from uranium can occur in various ways. The breakdown of uranium products creates radon daughters. These can attach to dust particles and, if workers inhale the dust, the particles lodge in their lungs, where they release high doses of radiation. This is believed to be why Navajo uranium miners face a risk of lung cancer that is 28 times normal.
Chemical element with atomic number 92 and atomic symbol U, which has three natural isotopes: U234, U235 and U238. The only naturally occurring fissile nuclide is U235, a quality that is exploited as a source of energy. Natural uranium contains 0.7% of this isotope.
A radioactive element, found in ores, of which atoms can be split to create energy.
A naturally occurring radioactive element. It is the basic material for nuclear technology. It is the heaviest naturally occurring (metal) element in the earth's crust, exists as three isotopes in the following percentages by weight: U-238, 99.27%; U-234, 0.72%; and U-235, 0.0056%; by radioactivity: U-238, 48%; U-234, 50%; and U-235, 2%; U-235 is the only fissile isotope (capable of sustaining a nuclear chain reaction), ie it is the uranium "bomb material" and nuclear reactor fuel isotope.
The heaviest element found in nature. Approximately 997 out of every 1000 uranium atoms are uranium-238. The remaining 3 atoms are the fissile uranium-235. The uranium-235 atom splits, or fissions, into lighter elements when its nucleus is struck by a neutron. One of four primary radionuclides in FUSRAP wastes, including radium-226, radon-222 and thorium-230. U.S. EPA - United States Environmental Protection Agency, sometimes referred to as EPA.
The heaviest naturally occurring trace element and also a naturally occurring radioactive element which spontaneously "decays" into lighter elements. Uranium was originally mined for use as the principal component of atomic bombs. Since about 1971, it has been mined exclusively for use as fuel in nuclear power reactors.
A mildly radioactive element with two isotopes which are fissile (U-235 and U-233) and two which are fertile (U-238 and U-234). Uranium is the basic fuel of nuclear energy.
is a naturally occurring element that is mined like many other ores. Although it is expensive to find and prepare for use as fuel in a nuclear plant, a very small amount of uranium can generate a lot of electricity. A single pound of uranium has as much energy as about three million pounds of coal.
Uranium (IPA: ) is a chemical element in the actinide series of the periodic table that has the symbol U and atomic number 92. The heaviest naturally occurring element, uranium is silvery metallic in color, nearly twice as dense as lead and radioactive. It occurs naturally in low concentrations (a few parts per million) in soil, rock, and surface and groundwater and is commercially extracted from uranium-bearing minerals such as Uraninite (see uranium mining).
Uranium was a popular TV series on Fuse TV in the early 2000s. It was hosted by Juliya Chernetsky and was Fuse's equivalent to MTV2's Headbangers Ball. The program traditionally ran a half hour featuring interviews with bands and music videos, largely of the heavy metal genre.
