Element Tungsten - W
Comprehensive data ~ above the chemical facet Tungsten is provided on this page; including scores of properties, facet names in numerous languages, most known nuclides of Tungsten. Usual chemical compounds room also detailed for plenty of elements. In enhancement technical terms are attached to their definitions and also the menu includes links come related short articles that space a good aid in one"s studies.
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Tungsten MenuTungsten web page OneOverview the TungstenTungsten"s name in various other LanguagesAtomic framework of TungstenChemical nature of TungstenPhysical properties of TungstenRegulatory / HealthWho/When/Where/HowTungsten page TwoNuclides / IsotopesPotential parental NuclidesTungsten page ThreeCommon chemistry Compounds of Tungsten
Overview of TungstenAtomic Number: 74Group: 6Period: 6Series: change Metals
Tungsten"s name in other LanguagesLatin: WolframiumCzech: WolframCroatian: VolframFrench: TungsténeGerman: Wolfram - rItalian: WolframioNorwegian: WolframPortuguese: TungstênioRussian: ВольфрамSpanish: WolframioSwedish: VolframAtomic framework of TungstenAtomic Radius: 2.02ÅAtomic Volume: 9.53cm3/molCovalent Radius: 1.3ÅCross Section (Thermal neutron Capture) σa/barns: 18.3Crystal Structure: Cubic body centered
Chemical properties of TungstenElectrochemical Equivalent: 1.1432g/amp-hrElectron occupational Function: 4.55eVElectronegativity: 2.36 (Pauling); 1.4 (Allrod Rochow)Heat the Fusion: 35.4kJ/molIncompatibilities:Bromine trifluoride, chlorine trifluoride, fluorine, iodine pentafluorideIonization PotentialFirst: 7.98Valence Electron Potential (-eV): 140
Physical nature of TungstenAtomic fixed Average: 183.85Boiling Point: 5928K 5655°C 10211°FCoefficient that lineal thermal expansion/K-1: 4.59E-6ConductivityElectrical: 0.189 106/cm ΩThermal: 1.74 W/cmKDensity: 19.35g/cc
300KDescription:Hard, silver-white steel that is generally acquired as a dull grey powder that is hard to melt.Elastic Modulus:Bulk: 311/GPaRigidity: 160.5/GPaYoungs: 411/GPaEnthalpy that Atomization: 837 kJ/mole
25°CEnthalpy the Fusion: 35.23 kJ/moleEnthalpy of Vaporization: 799.1 kJ/moleFlammablity Class: CombustibleFreezing Point: see melting pointHardness ScaleBrinell: 2570 MN m-2Mohs: 7.5Vickers: 3430 MN m-2Heat the Vaporization: 824kJ/molMelting Point: 3680K 3407°C 6165°FMolar Volume: 9.5 cm3/moleOptical Reflectivity: 62%Physical State (at 20°C & 1atm): SolidSpecific Heat: 0.13J/gKVapor Pressure = 4.27Pa
Regulatory / HealthCAS Number7440-33-7RTECS: Y07175000OSHA permissible Exposure border (PEL)No limits set by OSHAOSHA PEL Vacated 1989TWA: 5 mg/m3STEL: 10 mg/m3NIOSH recommended Exposure border (REL)TWA: 5 mg/m3STEL: 10 mg/m3 Routes of Exposure: Inhalation; Ingestion; Skin and/or eye contactTarget Organs: Eyes, skin, respiratory tract system, bloodLevels In Humans:Note: this data represents normally occuring level of elements in the usual human, the DOES NOT stand for recommended everyday allowances.Blood/mg dm-3: 0.001Bone/p.p.m: 0.00025Liver/p.p.m: n/aMuscle/p.p.m: n/aDaily dietary Intake: 0.001-0.015 mgTotal massive In Avg. 70kg human: 0.02 mg
Who / where / when / HowDiscoverer: Fausto and Juan José de ElhuijarDiscovery Location: Vergara SpainDiscovery Year: 1783Name Origin:Swedish: tung sten (heavy stone): W symbol indigenous its German name wolfram i beg your pardon is named after wolframite.Abundance of Tungsten:Earth"s Crust/p.p.m.: 160.6Seawater/p.p.m.: 0.000092Atmosphere/p.p.m.: 411Sun (Relative come H=1E12): 0.28Sources the Tungsten:Occurs in the mineral scheelite (CaWO4) and wolframite <(Fe,Mn)WO4>. Yearly world wide production is around 45,100 tons. Main mining locations are China, Malaysia, Burma, bolivia, canada, Australia, Japan and also USA.Uses of Tungsten:Used extensively in the electronics industry. Made into filaments because that vacuum tubes and electric lights. Additionally used in call points in cars, welding electrodes, rocket nozzles and also cutting tools. Combined with calcium or magnesium it provides phosphors.Additional Notes:Some sources provide the German chemist karl Wilhelm Scheele together the very first to isolation the steel in 1880, but most sources credit the Elhuijar brothers.
Tungsten MenuTungsten web page OneOverview the TungstenTungsten"s surname in other LanguagesAtomic framework of TungstenChemical nature of TungstenPhysical properties of TungstenRegulatory / HealthWho/When/Where/HowTungsten page TwoNuclides / IsotopesPotential parent NuclidesTungsten web page ThreeCommon chemistry Compounds the Tungsten
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