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elements of atomic number 95, which is the third transuranium element to be at the end of 1944 the University of California nuclear physics, chemist Seaborg and his colleagues - James, Morgan and Jiao Suo , who first completed. They use the word America (America) named this new element americium, element symbol Am.
Am

Am

used in smoke detection Am
Basic Information americium Pinyin: méi Traditional: Radicals: Jin, the Ministry of Foreign stroke: 9, total strokes: 14; Traditional radicals: gold, the Ministry of Foreign stroke: 9, Total Strokes: Wubi 17, 86 & 98: QNHG CJ: XCAHU square number: 87767 UniCode: CJK Unified Ideographs U +9545 basic meaning ● americium () méi mo ㄟ ◎ an artificial radioactive element. English translation ◎ americium americium English ◎ americium element names: Am atomic weight elements: [243] element type: metal atomic volume: (cc / mol) 17.86 oxidized Main Am +3 Other Am +2, Am +4, Am +5, Am +6 crystal structure: unit cell for the hexagonal unit cell. Cell parameters a = 346.81 pm b = 346.81 pm c = 1124.1 pm α = 90 ° β = 90 ° γ = 120 ° found by: Seaborg (GTSeaporg), James (RAJamse) and Morgan (LOMorgan) found Year: 1944 discovery: In 1944, the United States Seaborg (GTSeaporg), James (RAJamse) and Morgan (LOMorgan) irradiated in a reactor is plutonium found. Element Description: The melting point of 994 ± 4 ℃, boiling point 2607 ℃, density of 11.7 g / cm 3. Hexagonal-type silver-white metal, lustrous; scalability is better than the uranium and neptunium. The air gradually dimmed. Soluble in dilute acid. In dilute sulfuric acid or dilute nitric acid solution, can be oxidized to sulfate over two AmO22 + salt, dark yellow solution. Americium to +3 as the most stable, but there are +4, +6 Price compounds. There oxide, hydroxide, fluoride and chloride. Isotope 243Am half-life of 7.95 × 103 years; the other isotope 241Am half-life of 458 years. Element Source: In 1000 ~ 1200 ℃ americium trifluoride with barium reduction in the system. Element uses: often used as isotope thickness and isotopic radioactive sources such as X fluorescence analyzer. Elements of the first synthesis of secondary data is americium americium 241, plutonium-239 is bombarded with neutrons produced. Mei】【americium americium; Am (1) méi (2) a radioactive metallic element, uranium bombarded by high energy helium nuclei produced [americium] element Americium symbol Am () méi an artificial radioactive element mo ㄟ . Element symbols: Am English name: Americium Chinese name: americium relative atomic mass: 243.061 common valence: +2, +3, +4, +5, +6 electronegativity: 1.3 external electronic arrangement: 5f7 7s2 extranuclear electron emission Fabric: 2,8,18,32,[link widoczny dla zalogowanych],25,8,2 isotopes and radiation: Am-240 [2.1d] Am-241 [432.7y] Am-242 [16h] Am-242m [141y] Am-243 (discharge α [7370y]) Am-244 [10.1h] Am-245 [2.1h] Am-246 [39.0m] electron affinity and energy: 0 KJ · mol-1 the first ionization energy: 578 KJ · mol-1 s Second ionization energy: 0 KJ · mol-1 third ionization energy: 0 KJ · mol-1 single-mass density: 13.6 g/cm3 elemental melting point: 994.0 ℃ elemental boiling point: 2607.0 ℃ Atomic Radius: ionic radius of 0 Egypt: Egypt covalent radius : 0 Egypt common compounds: found by: Seaborg, James, Morgan, Chalk Time: 1945 Location: United States origin of the name: the nomenclature of europium imitation, with the name of the American continent Element Description: The silver-white metallic element of artificial radioactivity. Element Source: plutonium by neutron bombardment of americium atoms can be obtained. Element use: Americium 241 is currently used in smoke detectors. Americium is a synthetic radioactive chemical element, its chemical symbol is Am, its atomic number is 95, is one of actinide elements. Am Pinyin name is named after the Americas. Than its previous cycle, Eu, is the European name. Americium -243 is the most stable isotope, which has 7,370 years of half-life. Elements found in 1944 by Glen T. Seaborg, RA James, LO Morgan, and A. Ghiorso (United States, Illinois, Chicago) found. Obtained by neutron bombardment of plutonium sources. Use americium -241 smoke detector is often used. Physical properties of the state: artificial radioactive metal. Melting point (℃): 994 Boiling Point (℃): 2607 Density (g / cc, 300K): 13.67 heat / J / gK: 0.11 Evaporation Heat / KJ / mol: melting heat / KJ / mol: 14.4 Conductivity / 106 / cm: 0.022 Thermal conductivity / W / cmK: 0.1 Sun geological data (as opposed to H = 1 × 1012): Unknown sea / ppm: nil crust / ppm: nil Atlantic Surface: Pacific surface: the atmosphere / ppm (volume): Atlantic Deep: deep Pacific: biological data content of the liver in the human body / ppm: organs: Zero Muscle / ppm: Blood / mg dm-3: the daily dose / mg: Zero Bone / ppm: person (70Kg) were total body volume / mg: Zero compounds of americium trifluoride (americium trifluoride) Chemical formula AmF_3, molecular weight 300.12. Pink powder, a strong α radioactivity. Gravity 9.53, melting point 1393 ± 20 ℃. And LaF_3 structural similarities. Extremely stable in the air. Fluorine or chlorine dioxide by oxidation of americium americium hydrogen fluoride in the air in the 600-700 ℃ for 1 hour, or americium chloride and ammonium fluoride following formula for the metathesis reaction. Can be used to restore the system of metal americium. Am
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