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Tungsten

Metalsolid
Symbol: W
Atomic number: 74
Atomic mass: 183.84
Group: Transition Metal
CAS-number: 7440-33-7

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Physical data
Isotopes
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Physical data

Electronic dataThermal dataSteric data
Shells: 2, 8, 18, 32, 12, 2
Orbitals: [Xe] 4f14 5d4 6s2
Electronegativity: 1.7, 1.4
1. Ionization potential: 7.98 eV
2. Ionization potential: -- eV
3. Ionization potential: -- eV
Oxidation states: 6, 5, 4, 3, 2, 0
Electrical conductivity: 0.189 10^6
Melting point: 3410 °C ±20
Boiling point: 5660 °C
Specific heat: 0.13 J/gK
Heat of fusion: 35.40 kJ/mol
Heat of vaporization: 824.0 kJ/mol
Thermal conductivity: 1.74 W/cmK
Atomic radius: 2.02 Å
Ionic radius: 0.60 Å (+6)
Covalent radius: 1.30 Å
Atomic volume: 9.53 cm³/mol
Density (293 K): 19.3 g/cm³
Crystal structure: cubic body centered
cubic body centered

Isotopes

NuclideAbundance [%]MassSpinHalflifeDecay modeDecay tree
180W 0.14 179.947 0 -- --
181W 0 181 9/2 121.2d EC View
182W 26.41 181.948 0 -- --
183W 14.4 182.95 1/2 -- --
184W 30.64 183.951 0 -- --
185W 0 185 3/2 74.8d β- View
185Wm 0 185 9/2 1.6m IT View
186W 28.41 185.954 0 -- --
187W 0 187 3/2 23.9h β- View
188W 0 188 0 69.4d β- View

Other info

Name origin:Swedish: tung sten (heavy stone), symbol from its German name wolfram.
Description:Hard, steel-gray to white metal. Highest melting point of all metals.
Discovered by:Fausto and Juan José de Elhuyar
Year:1783
Place:Spain
Sources:Occurs in the minerals scheelite (CaWO4) and wolframite [(Fe,Mn)WO4].
Use(s):Made into filaments for vacuum tubes and electric lights. Also as contact points in cars. Combined with calcium or magnesium it makes phosphors. Tungsten carbide is extremely hard and is used for making cutting tools and abrasives.