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Uranium
Encyclopedia entry from: The Gale Encyclopedia of Science
...x2019; s radioactivity Uranium — the element used...xB0; C). All isotopes of uranium are radioactive. In total, natural uranium consists of three isotopes...neptunium, uranium is the heaviest element found on the Earth...
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Heavy Water Technology
Encyclopedia entry from: Encyclopedia of Espionage, Intelligence, and Security
Heavy Water Technology...the hydrogen atoms in natural water are deuterium...water can be obtained. Heavy water can also be extracted from natural water by repeated evaporation steps, as its heavier molecules are less volatile...nuclei (e.g., of uranium) to fission upon impact...
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nuclear energy
Book article from: The Columbia Encyclopedia, Sixth Edition
...combine to form a single, heavier nucleus. The most stable...fragments, occurs for very heavy nuclei, while fusion...fissionable isotope of uranium, U-235, can be split...the atomic number of uranium. A number of pairs...steady flow of energy. Uranium-235, which occurs...one part in 140 in ...
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Actinides
Encyclopedia entry from: UXL Encyclopedia of Science
...as to whether elements heavier than uranium would ever be found...greater than that of uranium. This new element was...transuranium (heaver than uranium) element ever discovered...mercury, and gold. Natural uranium consists of three...
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pitchblende
Book article from: The Columbia Encyclopedia, Sixth Edition
pitchblende , dark, lustrous, heavy mineral, a source of radium and uranium. Largely natural uranium oxides, triuranium octaoxide (U 3 O 8 ) and uranium dioxide (UO 2 ), it usually contains...
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Isotope
Encyclopedia entry from: UXL Encyclopedia of Science
...One answer to this question was to convert natural uranium to a gas and then allow the gas to diffuse...barrier. Researchers found that the 235 U in the natural uranium was slightly less heavy than the 238 U, so it diffused through the...
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fission, nuclear
Book article from: World Encyclopedia
...of nuclear reaction in which a heavy atomic nucleus splits into two...occurring fissionable material is uranium -235. Natural uranium is not capable of sustaining...a sustained chain reaction in uranium fuel. In the first, the neutrons...
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the Arctic
Book article from: The Columbia Encyclopedia, Sixth Edition
...warmer temperatures and heavier snowfalls than the colder...marshlands of the tundra. Natural Resources In parts of...are found a variety of natural resources, but many...copper, coal, gold, uranium, tungsten, and diamonds...copper, nickel, iron, natural gas, and oil. The arctic...
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Lung Cancer
Encyclopedia entry from: Gale Encyclopedia of Alternative Medicine
...found in people who are heavy smokers. Non-small...substances, such as uranium, and workers exposed...produced by the breakdown of uranium, and does not present...over soil containing natural uranium deposits, however...
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Element, Chemical
Encyclopedia entry from: UXL Encyclopedia of Science
...not found in nature. Natural and synthetic elements...have larger nuclei than uranium. Two Dozen Common and...x2014; A soft, heavy metal Magnesium Mg...used in space vehicles Uranium U — —...x2014; A very heavy metal; fuel for nuclear...
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