| | | General | | Name, symbol, number | uranium, U, 92 | | Chemical series | actinides | | Group, period, block | n/a, 7, f | | Appearance | silvery gray metallic;
corrodes to a spalling
black oxide coat in air
 | | Standard atomic weight | 238.02891(3) g·mol−1 | | Electron configuration | [Rn] 5f3 6d1 7s2 | | Electrons per shell | 2, 8, 18, 32, 21, 9, 2 | | Physical properties | | Phase | solid | | Density (near r.t.) | 19.1 g·cm−3 | | Liquid density at m.p. | 17.3 g·cm−3 | | Melting point | 1405.3 K
(1132.2 °C, 2070 °F) | | Boiling point | 4404 K
(4131 °C, 7468 °F) | | Heat of fusion | 9.14 kJ·mol−1 | | Heat of vaporization | 417.1 kJ·mol−1 | | Specific heat capacity | (25 °C) 27.665 J·mol−1·K−1 | Vapor pressure | P/Pa | 1 | 10 | 100 | 1 k | 10 k | 100 k | | at T/K | 2325 | 2564 | 2859 | 3234 | 3727 | 4402 | | | Atomic properties | | Crystal structure | orthorhombic | | Oxidation states | 3+,4+,5+,6+[1]
(weakly basic oxide) | | Electronegativity | 1.38 (Pauling scale) | | Ionization energies | 1st: 597.6 kJ·mol−1 | | 2nd: 1420 kJ·mol−1 | | Atomic radius | 175 pm | | Van der Waals radius | 186 pm | | Miscellaneous | | Magnetic ordering | paramagnetic | | Electrical resistivity | (0 °C) 0.280 µΩ·m | | Thermal conductivity | (300 K) 27.5 W·m−1·K−1 | | Thermal expansion | (25 °C) 13.9 µm·m−1·K−1 | | Speed of sound (thin rod) | (20 °C) 3155 m/s | | Young's modulus | 208 GPa | | Shear modulus | 111 GPa | | Bulk modulus | 100 GPa | | Poisson ratio | 0.23 | | CAS registry number | 7440-61-1 | | Selected isotopes | | | | References | | | Uranium (pronounced /jʊˈreɪniəm/) is a silver-gray metallic chemical element in the actinide series of the periodic table that has the symbol U and atomic number 92. It has 92 protons and electrons, 6 of them valence electrons. It can have between 141 and 146 neutrons, with 143 and 146 in its most common isotopes. Uranium has the highest atomic weight of the naturally occurring elements. Uranium is approximately 70% more dense than lead and is weakly radioactive. It occurs naturally in low concentrations (a few parts per million) in soil, rock and water, and is commercially extracted from uranium-bearing minerals such as uraninite (see uranium mining). Uranium may refer to: Uranium, the chemical element Uranium-232 Uranium-233 Uranium-234 Uranium-235 Uranium-238 Uranium-239 Uranium-240 Uranium City, Saskatchewan, a Canadian settlement Uranium (TV series), a music-video television series Category: ...
General Name, Symbol, Number protactinium, Pa, 91 Chemical series actinides Group, Period, Block n/a, 7, f Appearance bright, silvery metallic luster Standard atomic weight 231. ...
General Name, Symbol, Number neptunium, Np, 93 Chemical series actinides Group, Period, Block n/a, 7, f Appearance silvery metallic Standard atomic weight (237) g·mol−1 Electron configuration [Rn] 5f4 6d1 7s2 Electrons per shell 2, 8, 18, 32, 22, 9, 2 Physical properties Phase solid Density (near r. ...
General Name, Symbol, Number neodymium, Nd, 60 Chemical series lanthanides Group, Period, Block n/a, 6, f Appearance silvery white, yellowish tinge Standard atomic weight 144. ...
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This is a standard display of the periodic table of the elements. ...
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The actinide (or actinoid) series encompasses the 15 chemical elements that lie between actinium and lawrencium on the periodic table, with atomic numbers 89 - 103[1]. The actinide series derives its name from the first element in the series, actinium. ...
A group, also known as a family, is a vertical column in the periodic table of the chemical elements. ...
In the periodic table of the elements, a period is a horizontal row of the table. ...
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6 *Lanthanides 7 **Actinides IUPAC has not recommended a specific format for the periodic table, so different conventions are permitted and are often used for the group number of lanthanides and actinides. ...
A period 7 element is one of the chemical elements in the seventh row (or period) of the periodic table of the elements. ...
The f-block of the periodic table of elements consists of those elements for which, in the atomic ground state, the highest-energy electrons occupy f-orbitals. ...
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Kilogram per cubic metre is the SI measure of density and is represented as kg/m³, where kg stands for kilogram and m³ stands for cubic metre. ...
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Standard enthalpy change of fusion of period three. ...
Kilojoule per mole are an SI derived unit of energy per amount of material, where energy is measured in units of 1000 joules, and the amount of material is measured in mole units. ...
The heat of vaporization is a physical property of substances. ...
Kilojoule per mole are an SI derived unit of energy per amount of material, where energy is measured in units of 1000 joules, and the amount of material is measured in mole units. ...
Specific heat capacity, also known simply as specific heat, is the measure of the heat energy required to increase the temperature of a unit quantity of a substance by a certain temperature interval. ...
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Electronegativity is a measure of the ability of an atom or molecule to attract electrons in the context of a chemical bond. ...
The ionization energy (IE) of an atom or of a molecule is the energy required to strip it of an electron. ...
Kilojoule per mole are an SI derived unit of energy per amount of material, where energy is measured in units of 1000 joules, and the amount of material is measured in mole units. ...
Atomic radius: Ionic radius Covalent radius Metallic radius van der Waals radius edit Atomic radius, and more generally the size of an atom, is not a precisely defined physical quantity, nor is it constant in all circumstances. ...
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Metre per second (U.S. spelling: meter per second) is an SI derived unit of both speed (scalar) and velocity (vector), defined by distance in metres divided by time in seconds. ...
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Shear strain In materials science, shear modulus or modulus of rigidity, denoted by G, or sometimes S or μ, is defined as the ratio of shear stress to the shear strain:[1] where = shear stress; is the force which acts is the area on which the force acts = shear strain; is...
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Alpha decay Alpha decay is a type of radioactive decay in which an atom emits an alpha particle (two protons and two neutrons bound together into a particle identical to a helium nucleus) and transforms (or decays) into an atom with a mass number 4 less and atomic number 2...
Spontaneous fission (SF) is a form of radioactive decay characteristic of very heavy isotopes, and is theoretically possible for any atomic nucleus whose mass is greater than or equal to 100 amu (elements near ruthenium). ...
General Name, Symbol, Number thorium, Th, 90 Chemical series Actinides Group, Period, Block n/a, 7, f Appearance silvery white Standard atomic weight 232. ...
A Synthetic radioisotope is a radionuclide that is not found in nature: no natural process or mechanism exists which produces it, or it is so unstable that it decays away in a very short period of time. ...
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General Name, Symbol, Number thorium, Th, 90 Chemical series Actinides Group, Period, Block n/a, 7, f Appearance silvery white Standard atomic weight 232. ...
A year (from Old English gēr) is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ...
General Name, Symbol, Number thorium, Th, 90 Chemical series Actinides Group, Period, Block n/a, 7, f Appearance silvery white Standard atomic weight 232. ...
To help compare orders of magnitude of different times this page lists times between 1016 seconds (320 million years) and 1017 seconds (3200 million years). ...
General Name, Symbol, Number thorium, Th, 90 Chemical series Actinides Group, Period, Block n/a, 7, f Appearance silvery white Standard atomic weight 232. ...
A Synthetic radioisotope is a radionuclide that is not found in nature: no natural process or mechanism exists which produces it, or it is so unstable that it decays away in a very short period of time. ...
To help compare orders of magnitude of different times this page lists times between 3. ...
General Name, Symbol, Number thorium, Th, 90 Chemical series Actinides Group, Period, Block n/a, 7, f Appearance silvery white Standard atomic weight 232. ...
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General Name, Symbol, Number thorium, Th, 90 Chemical series Actinides Group, Period, Block n/a, 7, f Appearance silvery white Standard atomic weight 232. ...
Recommended values for many properties of the elements, together with various references, are collected on these data pages. ...
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The periodic table of the chemical elements A chemical element, or element, is a type of atom that is distinguished by its atomic number; that is, by the number of protons in its nucleus. ...
The actinide (or actinoid) series encompasses the 15 chemical elements that lie between actinium and lawrencium on the periodic table, with atomic numbers 89 - 103[1]. The actinide series derives its name from the first element in the series, actinium. ...
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See also: List of elements by atomic number In chemistry and physics, the atomic number (also known as the proton number) is the number of protons found in the nucleus of an atom. ...
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General Name, Symbol, Number lead, Pb, 82 Chemical series Post-transition metals or poor metals Group, Period, Block 14, 6, p Appearance bluish gray Standard atomic weight 207. ...
Radioactive decay is the process in which an unstable atomic nucleus loses energy by emitting radiation in the form of particles or electromagnetic waves. ...
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For the band, see Pitchblende (band). ...
The Ranger Uranium Mine in Australia. ...
In nature, uranium atoms exist as uranium-238 (99.284%), uranium-235 (0.711%)[2], and a very small amount of uranium-234 (0.0058%). 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,[3] making them useful in dating the age of the Earth (see uranium-thorium dating, uranium-lead dating and uranium-uranium dating). 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 both fissionable by fast neutrons, and fertile (capable of being transmuted to fissile plutonium-239 in a nuclear reactor). An artificial fissile isotope, uranium-233, can be produced from natural thorium and is also important in nuclear technology. While uranium-238 has a small probability to fission spontaneously or when bombarded with fast neutrons, the much higher probability of uranium-235 and to a lesser degree uranium-233 to fission when bombarded with slow neutrons generates the heat in nuclear reactors used as a source of power, and provides the fissile material for nuclear weapons. Both uses rely on the ability of uranium to produce a sustained nuclear chain reaction. Depleted uranium (uranium-238) is used in kinetic energy penetrators and armor plating.[4] There are two objects with this name: Unterseeboot 238 Uranium-238, the most common isotope of uranium This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ...
Uranium-235 is an isotope of uranium that differs from the elements other common isotope, uranium-238, by its ability to cause a rapidly expanding fission chain reaction. ...
U-234 is an isotope of uranium. ...
An alpha particle is deflected by a magnetic field Alpha radiation consists of helium-4 nuclei and is readily stopped by a sheet of paper. ...
Half-Life For a quantity subject to exponential decay, the half-life is the time required for the quantity to fall to half of its initial value. ...
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Earth as seen from Apollo 17 Modern geologists consider the age of the Earth to be around 4. ...
Uranium-thorium dating, also often referred to as thorium-230 dating, uranium-series disequilibrium dating or uranium-series dating, is a radiometric dating technique commonly used to determine the age of carbonate materials such as speleothem or coral. ...
Radiometric dating is a technique used to date materials based on a knowledge of the decay rates of naturally occurring isotopes, and the current abundances. ...
Uranium-uranium dating is a radiometric dating technique utilizing the comparison of two isotopes of uranium in a sample: uranium-238 and uranium-234. ...
The nucleus of an atom is the very small dense region, of positive charge, in its centre consisting of nucleons (protons and neutrons). ...
This article or section should include material from Fissile material In nuclear engineering, a fissile material is one that is capable of sustaining a chain reaction of nuclear fission. ...
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Fertile material is a term used to describe nuclides which generally themselves do not undergo induced fission (fissionable by thermal neutrons) but from which fissile material is generated by neutron absorption and subsequent nuclei conversions. ...
General Name, Symbol, Number plutonium, Pu, 94 Chemical series actinides Group, Period, Block ?, 7, f Appearance silvery white Atomic mass (244) g/mol Electron configuration [Rn] 5f6 7s2 Electrons per shell 2, 8, 18, 32, 24, 8, 2 Physical properties Phase solid Density (near r. ...
Core of a small nuclear reactor used for research. ...
Uranium-233 is a fissile artificial isotope of uranium, which is proposed as a nuclear fuel. ...
General Name, Symbol, Number thorium, Th, 90 Chemical series Actinides Group, Period, Block n/a, 7, f Appearance silvery white Standard atomic weight 232. ...
Spontaneous fission (SF) is a form of radioactive decay characteristic of very heavy isotopes, and is theoretically possible for any atomic nucleus whose mass is greater than or equal to 100 amu (elements near ruthenium). ...
Core of a small nuclear reactor used for research. ...
The mushroom cloud of the atomic bombing of Nagasaki, Japan, 1945, rose some 18 kilometers (11 mi) above the hypocenter A nuclear weapon derives its destructive force from nuclear reactions of fusion or fission. ...
A schematic nuclear fission chain reaction. ...
Depleted uranium storage yard. ...
French anti-tank round with its sabot APFSDS at point of separation of sabot. ...
Military vehicles are commonly armoured to withstand the impact of shrapnel, bullets or shells, protecting the soldiers inside from enemy fire. ...
Uranium is used as a colorant in uranium glass, producing orange-red to lemon yellow hues. 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 planet Uranus. Eugène-Melchior Péligot was the first person to isolate the metal, and its radioactive properties were uncovered in 1896 by Antoine Becquerel. Research by Enrico Fermi and others 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 enriched uranium and uranium-derived plutonium. The security of those weapons and their fissile material following the breakup of the Soviet Union in 1991 is a concern for public health and safety. Missing image A selection of uranium glasses Uranium farce, also known as vaseline farce, is a pale yellow or yellow-green glass made by the inclusion of uranium. ...
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Martin Heinrich Klaproth Martin Heinrich Klaproth (1 December 1743 – 1 January 1817) was a German chemist. ...
For other uses, see Uranus (disambiguation). ...
Eugène-Melchior Péligot (born 1811[1], died 1890[1]), also known as Eugene Peligot, was a French chemist who isolated the first sample of uranium metal in 1841[1]. Peligot proved that the black powder of Martin Heinrich Klaproth was not a pure metal (it was an oxide...
Henri Becquerel Antoine Henri Becquerel (December 15, 1852 – August 25, 1908) was a French physicist, Nobel laureate, and one of the discoverers of radioactivity. ...
Fermi redirects here. ...
Little Boy was the codename of the atomic bomb which was dropped on Hiroshima, on August 6, 1945 by the 12-man crew of the B-29 Superfortress Enola Gay, piloted by Colonel Paul Tibbets (Tibbets, age 92, died Nov. ...
The mushroom cloud over Hiroshima after the dropping of Little Boy. ...
The term arms race in its original usage, describes a competition between two or more parties for military supremacy. ...
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These pie-graphs showing the relative proportions of uranium-238 (blue) and uranium-235 (red) at different levels of enrichment. ...
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Characteristics
 An induced nuclear fission event involving uranium-235 When refined, uranium is a silvery white, weakly radioactive metal, which is slightly softer than steel,[5] strongly electropositive and a poor electrical conductor.[6] It is malleable, ductile, and slightly paramagnetic.[5] Uranium metal has very high density, being approximately 70% more dense than lead, but slightly less dense than gold. Image File history File links Nuclear_fission. ...
Image File history File links Nuclear_fission. ...
Refining (as in non-metallurgical uses) consists of purifying an impure material, in this case a metal. ...
This article is about metallic materials. ...
For other uses, see Steel (disambiguation). ...
Electronegativity is a measure of the ability of an atom or molecule to attract electrons in the context of a chemical bond. ...
Not to be confused with electrical conductance, a measure of an objects or circuits ability to conduct an electric current between two points, which is dependent on the electrical conductivity and the geometric dimensions of the conducting object. ...
Look up malleability in Wiktionary, the free dictionary. ...
Gold is a highly ductile metal Ductility is a mechanical property which describes how much plastic deformation a material can sustain before fracture occurs. ...
Simple Illustration of a paramagnetic probe made up from miniature magnets. ...
For other uses, see Density (disambiguation). ...
General Name, Symbol, Number lead, Pb, 82 Chemical series Post-transition metals or poor metals Group, Period, Block 14, 6, p Appearance bluish gray Standard atomic weight 207. ...
GOLD refers to one of the following: GOLD (IEEE) is an IEEE program designed to garner more student members at the university level (Graduates of the Last Decade). ...
Uranium metal reacts with almost all nonmetallic elements and their compounds, with reactivity increasing with temperature.[7] Hydrochloric and nitric acids dissolve uranium, but nonoxidizing acids attack the element very slowly.[6] When finely divided, it can react with cold water; in air, uranium metal becomes coated with a dark layer of uranium oxide.[5] Uranium in ores is extracted chemically and converted into uranium dioxide or other chemical forms usable in industry. Look up chemical compound in Wiktionary, the free dictionary. ...
Hydrochloric acid is the aqueous solution of hydrogen chloride gas (HCl). ...
The chemical compound nitric acid (HNO3), also known as aqua fortis and spirit of nitre, is an aqueous solution of hydrogen nitrate (anhydrous nitric acid). ...
UO2 A black, radioactive, crystalline powder, once used in the late 1800s to mid-1900s in ceramic glazes. ...
Uranium was the first element that was found to be fissile. Upon bombardment with slow neutrons, its uranium-235 isotope will most of the time divide into two smaller nuclei, releasing nuclear binding energy and more neutrons. If these neutrons are absorbed by other uranium-235 nuclei, a nuclear chain reaction occurs and, if there is nothing to absorb some neutrons and slow the reaction, the reaction is explosive. As little as 15 lb (7 kg) of uranium-235 can be used to make an atomic bomb.[8] The first atomic bomb worked by this principle (nuclear fission). For the generation of electrical power by fission, see Nuclear power plant. ...
This article or section does not adequately cite its references or sources. ...
Uranium-235 is an isotope of uranium that differs from the elements other common isotope, uranium-238, by its ability to cause a rapidly expanding fission chain reaction. ...
For other uses, see Isotope (disambiguation). ...
The nucleus of an atom is the very small dense region, of positive charge, in its centre consisting of nucleons (protons and neutrons). ...
Binding energy is the energy required to disassemble a whole into separate parts. ...
A schematic nuclear fission chain reaction. ...
Applications
Military The major application of uranium in the military sector is in high-density penetrators. This ammunition consists of depleted uranium (DU) alloyed with 1–2% other elements. At high impact speed, the density, hardness, and flammability of the projectile enable destruction of heavily armored targets. Tank armor and the removable armor on combat vehicles are also hardened with depleted uranium (DU) plates. The use of DU became a contentious political-environmental issue after the use of DU munitions by the US, UK and other countries during wars in the Persian Gulf and the Balkans raised questions of uranium compounds left in the soil (see Gulf War Syndrome).[8] Image File history File links 30mm_DU_slug. ...
Image File history File links 30mm_DU_slug. ...
Depleted uranium storage yard. ...
Depleted uranium storage yard. ...
Gulf War syndrome (GWS) or Gulf War illness (GWI) is the name given to an illness with symptoms including increases in the rate of immune system disorders and birth defects, reported by combat veterans of the 1991 Persian Gulf War. ...
Depleted uranium is also used as a shielding material in some containers used to store and transport radioactive materials.[6] Other uses of DU include counterweights for aircraft control surfaces, as ballast for missile re-entry vehicles and as a shielding material.[5] Due to its high density, this material is found in inertial guidance devices and in gyroscopic compasses.[5] DU is preferred over similarly dense metals due to its ability to be easily machined and cast as well as its relatively low cost.[9] Counter to popular belief, the main risk of exposure to DU is chemical poisoning by uranium oxide rather than radioactivity (uranium being only a weak alpha emitter). “Reentry†redirects here. ...
An inertial guidance system consists of an Inertial Measurement Unit (IMU) combined with a set of guidance algorithms and control mechanisms, allowing the path of a vehicle to be controlled according to the position determined by the inertial navigation system. ...
A gyroscope For other uses, see Gyroscope (disambiguation). ...
This article is about the navigational instrument. ...
Alpha decay Alpha decay is a type of radioactive decay in which an atom emits an alpha particle (two protons and two neutrons bound together into a particle identical to a helium nucleus) and transforms (or decays) into an atom with a mass number 4 less and atomic number 2...
During the later stages of World War II, the entire Cold War, and to a much lesser extent afterwards, uranium was used as the fissile explosive material to produce nuclear weapons. Two major types of fission bombs were built: a relatively simple device that uses uranium-235 and a more complicated mechanism that uses uranium-238-derived plutonium-239. Later, a much more complicated and far more powerful fusion bomb that uses a plutonium-based device in a uranium casing to cause a mixture of tritium and deuterium to undergo nuclear fusion was built.[10] Combatants Allied powers: China France Great Britain Soviet Union United States and others Axis powers: Germany Italy Japan and others Commanders Chiang Kai-shek Charles de Gaulle Winston Churchill Joseph Stalin Franklin Roosevelt Adolf Hitler Benito Mussolini Hideki TÅjÅ Casualties Military dead: 17,000,000 Civilian dead: 33,000...
For other uses, see Cold War (disambiguation). ...
The mushroom cloud of the atomic bombing of Nagasaki, Japan, 1945, rose some 18 kilometers (11 mi) above the hypocenter A nuclear weapon derives its destructive force from nuclear reactions of fusion or fission. ...
Uranium-235 is an isotope of uranium that differs from the elements other common isotope, uranium-238, by its ability to cause a rapidly expanding fission chain reaction. ...
There are two objects with this name: Unterseeboot 238 Uranium-238, the most common isotope of uranium This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ...
General Name, Symbol, Number plutonium, Pu, 94 Chemical series actinides Group, Period, Block ?, 7, f Appearance silvery white Atomic mass (244) g/mol Electron configuration [Rn] 5f6 7s2 Electrons per shell 2, 8, 18, 32, 24, 8, 2 Physical properties Phase solid Density (near r. ...
Tritium (symbol T or ³H) is a radioactive isotope of hydrogen. ...
Deuterium, also called heavy hydrogen, is a stable isotope of hydrogen with a natural abundance in the oceans of Earth of approximately one atom in 6500 of hydrogen (~154 PPM). ...
The deuterium-tritium (D-T) fusion reaction is considered the most promising for producing sustainable fusion power. ...
Civilian
 The most visible civilian use of uranium is as the thermal power source used in nuclear power plants. The main use of uranium in the civilian sector is to fuel commercial nuclear power plants; by the time it is completely fissioned, one kilogram of uranium-235 can theoretically produce about 20 trillion joules of energy (20×1012 joules); as much electricity as 1500 tonnes of coal.[4] Image File history File linksMetadata Nuclear_Power_Plant_2. ...
Image File history File linksMetadata Nuclear_Power_Plant_2. ...
A nuclear power station. ...
A nuclear power station. ...
One million million (1,000,000,000,000) is the natural number following 999,999,999,999 and preceding 1,000,000,000,001. ...
The joule (IPA: or ) (symbol: J) is the SI unit of energy. ...
Electricity (from New Latin Ä“lectricus, amberlike) is a general term for a variety of phenomena resulting from the presence and flow of electric charge. ...
This article is about the metric tonne. ...
Coal Example chemical structure of coal Coal is a fossil fuel formed in ecosystems where plant remains were saved by water and mud from oxidization and biodegradation. ...
Commercial nuclear power plants use fuel that is typically enriched to around 3% uranium-235,[4] the CANDU reactor is the only commercial reactor capable of using unenriched uranium fuel. Fuel used for United States Navy reactors is typically highly enriched in uranium-235 (the exact values are classified). In a breeder reactor, uranium-238 can also be converted into plutonium through the following reaction:[5] 238U (n, gamma) → 239U -(beta) → 239Np -(beta) → 239Pu. This article is about applications of nuclear fission reactors as power sources. ...
Qinshan Phase III Units 1 & 2, located in Zhejiang China: Two CANDU 6 reactors, designed by Atomic Energy of Canada Limited (AECL), owned and operated by the Third Qinshan Nuclear Power Company Limited. ...
USN redirects here. ...
A typical classified document. ...
A breeder reactor is a nuclear reactor that breeds fuel. ...
This article is about the radioactive element. ...
Prior to the discovery of radiation, uranium was primarily used in small amounts for yellow glass and pottery glazes (such as uranium glass and in Fiestaware). Image File history File linksMetadata Download high-resolution version (1600x1200, 899 KB) A picture of Uranium Glass florescing under Ultraviolet light. ...
Image File history File linksMetadata Download high-resolution version (1600x1200, 899 KB) A picture of Uranium Glass florescing under Ultraviolet light. ...
Missing image A selection of uranium glasses Uranium farce, also known as vaseline farce, is a pale yellow or yellow-green glass made by the inclusion of uranium. ...
For other uses, see Ultraviolet (disambiguation). ...
Image File history File links Metadata Size of this preview: 796 × 599 pixelsFull resolution‎ (1,360 × 1,024 pixels, file size: 626 KB, MIME type: image/jpeg) File historyClick on a date/time to view the file as it appeared at that time. ...
Image File history File links Metadata Size of this preview: 796 × 599 pixelsFull resolution‎ (1,360 × 1,024 pixels, file size: 626 KB, MIME type: image/jpeg) File historyClick on a date/time to view the file as it appeared at that time. ...
Missing image A selection of uranium glasses Uranium farce, also known as vaseline farce, is a pale yellow or yellow-green glass made by the inclusion of uranium. ...
See Capacitor (component) for a discussion of specific types. ...
For other uses, see Radiation (disambiguation). ...
Missing image A selection of uranium glasses Uranium farce, also known as vaseline farce, is a pale yellow or yellow-green glass made by the inclusion of uranium. ...
An assortment of Fiesta plates. ...
After Marie Curie discovered radium in uranium ore, a huge industry developed to mine uranium so as to extract the radium, which was used to make glow-in-the-dark paints for clock and aircraft dials[2]. This left a prodigious quantity of uranium as a 'waste product', since it takes three metric tons of uranium to extract one gram of radium, which is also one curie of radioactivity. This 'waste product' was diverted to the glazing industry, making uranium glazes very inexpensive and abundant. In addition to the pottery glazes, uranium tile glazes accounted for the bulk of the use, including common bathroom and kitchen tiles which can be colored green, yellow, mauve, black, blue, red and other colors with uranium. This article is about the chemist and physicist. ...
For other uses, see Radium (disambiguation). ...
A tonne (also called metric ton) is a non-SI unit of mass, accepted for use with SI, defined as: 1 tonne = 103 kg (= 106 g). ...
BIC pen cap, about 1 gram. ...
The curie (symbol Ci) is a former unit of radioactivity, defined as 3. ...
Uranium was also used in photographic chemicals (esp. uranium nitrate as a toner),[5] in lamp filaments, to improve the appearance of dentures, and in the leather and wood industries for stains and dyes. Uranium salts are mordants of silk or wool. Uranyl acetate and uranyl formate are used as stains in transmission electron microscopy, to increase the contrast of biological specimens in ultrathin sections and in negative staining of viruses, isolated cell organelles and macromolecules. Photography [fәtɑgrәfi:],[foʊtɑgrәfi:] is the process of recording pictures by means of capturing light on a light-sensitive medium, such as a film or electronic sensor. ...
Uranium nitrate - Wikipedia /**/ @import /skins-1. ...
A color toner bottle Toner is a powder used in laser printers and photocopiers to form the text and images on the printed paper. ...
A maxillary denture. ...
Look up Mordant in Wiktionary, the free dictionary. ...
TEM redirects here. ...
Negative staining is an established method, often used in diagnostic microscopy, for contrasting a thin specimen with an optically opaque fluid. ...
This article is about biological infectious particles. ...
In cell biology, an organelle is one of several structures with specialized functions, suspended in the cytoplasm of a eukaryotic cell. ...
Illustration of a polypeptide macromolecule The term macromolecule by definition implies large molecule. In the context of biochemistry, the term may be applied to the four conventional biopolymers (nucleotides, proteins, carbohydrates, and lipids), as well as non-polymeric molecules with large molecular mass such as macrocycles. ...
The discovery of the radioactivity of uranium ushered in additional scientific and practical uses of the element. The long half-life of the isotope uranium-238 (4.51×109 years) makes it well-suited for use in estimating the age of the earliest igneous rocks and for other types of radiometric dating (including uranium-thorium dating and uranium-lead dating). Uranium metal is used for X-ray targets in the making of high-energy X-rays.[5] Half-Life For a quantity subject to exponential decay, the half-life is the time required for the quantity to fall to half of its initial value. ...
Igneous rocks (etymology from Latin ignis, fire) are rocks formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks. ...
Radiometric dating (often called radioactive dating) is a technique used to date materials, based on a comparison between the observed abundance of particular naturally occurring radioactive isotopes and their known decay rates. ...
Uranium-thorium dating, also often referred to as thorium-230 dating, uranium-series disequilibrium dating or uranium-series dating, is a radiometric dating technique commonly used to determine the age of carbonate materials such as speleothem or coral. ...
Radiometric dating is a technique used to date materials based on a knowledge of the decay rates of naturally occurring isotopes, and the current abundances. ...
In the NATO phonetic alphabet, X-ray represents the letter X. An X-ray picture (radiograph) taken by Röntgen An X-ray is a form of electromagnetic radiation with a wavelength approximately in the range of 5 pm to 10 nanometers (corresponding to frequencies in the range 30 PHz...
History
Pre-discovery use The use of uranium in its natural oxide form dates back to at least the year 79, when it was used to add a yellow color to ceramic glazes.[5] Yellow glass with 1% uranium oxide was found in a Roman villa on Cape Posillipo in the Bay of Naples, Italy by R. T. Gunther of the University of Oxford in 1912.[11] Starting in the late Middle Ages, pitchblende was extracted from the Habsburg silver mines in Joachimsthal, Bohemia (now Jáchymov in the Czech Republic) and was used as a coloring agent in the local glassmaking industry.[12] In the early 19th century, the world's only known source of uranium ores were these old mines. An oxide is a chemical compound containing at least one oxygen atom and other elements. ...
This article is about ceramic materials. ...
For other uses, see Roman Empire (disambiguation). ...
Mount Vesuvius as seen from Posillipo Posillipo is a residential quarter of Naples, called Pusilleco in the Neapolitan language. ...
Gulf of Naples The Gulf of Naples is located off the southwestern coast of Italy. ...
The University of Oxford (informally Oxford University), located in the city of Oxford, England, is the oldest university in the English-speaking world. ...
The Middle Ages formed the middle period in a traditional schematic division of European history into three ages: the classical civilization of Antiquity, the Middle Ages, and modern times, beginning with the Renaissance. ...
For the band, see Pitchblende (band). ...
Flag of the Habsburg Monarchy; also used as the flag of the Austrian Empire until the Ausgleich of 1867. ...
Spa at the beginning of 20th century, photographed by Å echtl and VoseÄek For other places called Joachimsthal, see Joachimsthal (disambiguation) Jáchymov (IPA: ; in German originally Thal, later Sankt Joachimsthal or Joachimsthal, as it is also known in English) is a spa town in north-west Bohemia in the...
For other uses, see Bohemia (disambiguation). ...
This article is about the material. ...
Discovery The discovery of the element is credited to the German chemist Martin Heinrich Klaproth. While he was working in his experimental laboratory in Berlin in 1789, Klaproth was able to precipitate a yellow compound (likely sodium diuranate) by dissolving pitchblende in nitric acid and neutralizing the solution with sodium hydroxide.[12] Klaproth mistakenly assumed the yellow substance was the oxide of a yet-undiscovered element and heated it with charcoal to obtain a black powder, which he thought was the newly discovered metal itself (in fact, that powder was an oxide of uranium).[12][13] He named the newly discovered element after the planet Uranus, which had been discovered eight years earlier by William Herschel.[14] Photographic plate made by Henri Becquerel showing effects of exposure to radioactivity. ...
Photographic plate made by Henri Becquerel showing effects of exposure to radioactivity. ...
For the SI unit of radioactivity, see Becquerel. ...
Radioactivity may mean: Look up radioactivity in Wiktionary, the free dictionary. ...
Photographic plates were one of the earliest forms of photographic film, in which a light-sensitive emulsion of silver salts was applied to a glass plate. ...
This article or section should be merged with Timeline of chemical element discovery The story of the discoveries of the chemical elements is presented here in chronological order. ...
Martin Heinrich Klaproth Martin Heinrich Klaproth (1 December 1743 – 1 January 1817) was a German chemist. ...
This article is about the capital of Germany. ...
Sodium diuranate, Na2U2O7·6H2O, is a uranium salt also known as the yellow oxide of uranium. ...
The chemical compound nitric acid (HNO3), also known as aqua fortis and spirit of nitre, is an aqueous solution of hydrogen nitrate (anhydrous nitric acid). ...
Sodium hydroxide (NaOH), also known as lye, caustic soda and (incorrectly, according to IUPAC nomenclature)[1] sodium hydrate, is a caustic metallic base. ...
Charcoal is the blackish residue consisting of impure carbon obtained by removing water and other volatile constituents from animal and vegetation substances. ...
For other uses, see Uranus (disambiguation). ...
For other persons named William Herschel, see William Herschel (disambiguation). ...
In 1841, Eugène-Melchior Péligot, who was Professor of Analytical Chemistry at the Conservatoire National des Arts et Métiers (Central School of Arts and Manufactures) in Paris, isolated the first sample of uranium metal by heating uranium tetrachloride with potassium.[15][12] Uranium was not seen as being particularly dangerous during much of the 19th century, leading to the development of various uses for the element. One such use for the oxide was the aforementioned but no longer secret coloring of pottery and glass. Eugène-Melchior Péligot (born 1811[1], died 1890[1]), also known as Eugene Peligot, was a French chemist who isolated the first sample of uranium metal in
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