What does uranium mean?
Definitions for uranium
yʊˈreɪ ni əmura·ni·um
This dictionary definitions page includes all the possible meanings, example usage and translations of the word uranium.
uranium, U, atomic number 92noun
a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons
The element with atomic number 92 and symbol U.
Etymology: After Uranus (the planet).
Uranium is a chemical element with the symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium is weakly radioactive because all isotopes of uranium are unstable; the half-lives of its naturally occurring isotopes range between 159,200 years and 4.5 billion years. The most common isotopes in natural uranium are uranium-238 (which has 146 neutrons and accounts for over 99% of uranium on Earth) and uranium-235 (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 and water, and is commercially extracted from uranium-bearing minerals such as uraninite.In nature, uranium is found as uranium-238 (99.2739–99.2752%), uranium-235 (0.7198–0.7202%), and a very small amount of uranium-234 (0.0050–0.0059%). Uranium decays slowly by emitting an alpha particle. The half-life of uranium-238 is about 4.47 billion years and that of uranium-235 is 704 million years, making them useful in dating the age of the Earth. Many contemporary uses of uranium exploit its unique nuclear properties. Uranium-235 is the only naturally occurring fissile isotope, which makes it widely used in nuclear power plants and nuclear weapons. However, because of the tiny amounts found in nature, uranium needs to undergo enrichment so that enough uranium-235 is present. Uranium-238 is fissionable by fast neutrons, and is fertile, meaning it can be transmuted to fissile plutonium-239 in a nuclear reactor. Another fissile isotope, uranium-233, can be produced from natural thorium and is studied for future industrial use in nuclear technology. Uranium-238 has a small probability for spontaneous fission or even induced fission with fast neutrons; uranium-235 and to a lesser degree uranium-233 have a much higher fission cross-section for slow neutrons. In sufficient concentration, these isotopes maintain a sustained nuclear chain reaction. This generates the heat in nuclear power reactors, and produces the fissile material for nuclear weapons. Depleted uranium (238U) is used in kinetic energy penetrators and armor plating. Uranium is used as a colorant in uranium glass, producing lemon yellow to green colors. Uranium glass fluoresces green in ultraviolet light. It was also used for tinting and shading in early photography. The 1789 discovery of uranium in the mineral pitchblende is credited to Martin Heinrich Klaproth, who named the new element after the recently discovered planet Uranus. Eugène-Melchior Péligot was the first person to isolate the metal and its radioactive properties were discovered in 1896 by Henri Becquerel. Research by Otto Hahn, Lise Meitner, Enrico Fermi and others, such as J. Robert Oppenheimer starting in 1934 led to its use as a fuel in the nuclear power industry and in Little Boy, the first nuclear weapon used in war. An ensuing arms race during the Cold War between the United States and the Soviet Union produced tens of thousands of nuclear weapons that used uranium metal and uranium-derived plutonium-239. The security of those weapons is closely monitored. Since around 2000, plutonium obtained by dismantling cold war era bombs is used as fuel for nuclear reactors.The development and deployment of these nuclear reactors continue on a global base. There is increasing interest in these power plants as they are powerful sources of CO2 free energy. In 2019, 440 nuclear power reactors produced 2586 TWh (billion kWh) of CO2 free electricity worldwide, more than the global installations of solar and wind power combined.
an element of the chromium group, found in certain rare minerals, as pitchblende, uranite, etc., and reduced as a heavy, hard, nickel-white metal which is quite permanent. Its yellow oxide is used to impart to glass a delicate greenish-yellow tint which is accompanied by a strong fluorescence, and its black oxide is used as a pigment in porcelain painting. Symbol U. Atomic weight 239.
Uranium is a silvery-white metallic chemical element in the actinide series of the periodic table, with symbol U and atomic number 92. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium is weakly radioactive because all its isotopes are unstable. The most common isotopes of uranium are uranium-238 and uranium-235. Uranium has the second highest atomic weight of the primordially occurring elements, lighter only than plutonium. Its density is about 70% higher than that of lead, but not as dense as gold or tungsten. It occurs naturally in low concentrations of a few parts per million in soil, rock and water, and is commercially extracted from uranium-bearing minerals such as uraninite. In nature, uranium is found as uranium-238, uranium-235, and a very small amount of uranium-234. Uranium decays slowly by emitting an alpha particle. The half-life of uranium-238 is about 4.47 billion years and that of uranium-235 is 704 million years, making them useful in dating the age of the Earth. Many contemporary uses of uranium exploit its unique nuclear properties. Uranium-235 has the distinction of being the only naturally occurring fissile isotope. Uranium-238 is fissionable by fast neutrons, and is fertile, meaning it can be transmuted to fissile plutonium-239 in a nuclear reactor. Another fissile isotope, uranium-233, can be produced from natural thorium and is also important in nuclear technology. While uranium-238 has a small probability for spontaneous fission or even induced fission with fast neutrons, uranium-235 and to a lesser degree uranium-233 have a much higher fission cross-section for slow neutrons. In sufficient concentration, these isotopes maintain a sustained nuclear chain reaction. This generates the heat in nuclear power reactors, and produces the fissile material for nuclear weapons. Depleted uranium is used in kinetic energy penetrators and armor plating.
Chambers 20th Century Dictionary
ū-rā′ni-um, n. a very hard but moderately malleable metal, resembling nickel or iron in its lustre and colour, but in a finely comminuted state occurring as a black powder.—adj. Urā′nic. [Gr. ouranos, heaven.]
U.S. National Library of Medicine
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.
The numerical value of uranium in Chaldean Numerology is: 7
The numerical value of uranium in Pythagorean Numerology is: 7
Examples of uranium in a Sentence
We are on schedule and we think we can do this business instead of diluting. We can do the business and receive natural uranium in return for selling our enriched uranium to outside.
We take very seriously its provocative announcement of an intent to begin enriching uranium at 60 percent.
If the dozens of countries interested in nuclear energy also choose to pursue uranium enrichment, the risk of proliferation of dangerous nuclear materials and weapons would grow beyond the tipping point. This has been our experience with Iran.
Prime Minister Benjamin Netanyahu:
By next spring, at most by next summer at current enrichment rates, they will have finished the medium enrichment and move on to the final stage. From there, it's only a few months, possibly a few weeks before they get enough enriched uranium for the first bomb.
Trumpand Irans regime has taken new steps to advance its nuclear ambitions, once again, The Iranian regime uses The Iranian regime nuclear program to extort the international community and threaten regional security. The worlds top sponsor of terrorism can never be allowed to enrich uranium at any level.
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Translations for uranium
From our Multilingual Translation Dictionary
- uraniCatalan, Valencian
- uraniumWestern Frisian
- uràiniamScottish Gaelic
- 鈾, ウランJapanese
- 우란, 우라늄Korean
- UranLuxembourgish, Letzeburgesch
- uranium, uraanDutch
- uranNorwegian Nynorsk
- łéétsohNavajo, Navaho
- ураниј, уран, uran, uranijSerbo-Croatian
- uran, уранUzbek
- uran, uraniVietnamese
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