Tungsten

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Tungsten,  74W
Wolfram evaporated crystals and 1cm3 cube.jpg
General properties
Appearance grayish white, lustrous
Staundart atomic wecht (Ar, staundart) 183.84(1)
Tungsten in the periodic cairt
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Airn Cobalt Nickel Capper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Siller (element) Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercur (element) Thallium Leid (element) Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium
Mo

W

Sg
tantalumtungstenrhenium
Atomic nummer (Z) 74
Group group 6
Period period 6
Element category   transition metal
Block d-block
Electron confeeguration [Xe] 4f14 5d4 6s2[1]
Electrons per shell
2, 8, 18, 32, 12, 2
Pheesical properties
Phase (at STP) solit
Meltin pynt 3695 K ​(3422 °C, ​6192 °F)
Bylin pynt 5828 K ​(5555 °C, ​10031 °F)
Density (near r.t.) 19.25 g/cm3
when liquid (at m.p.) 17.6 g/cm3
Creetical pynt 13892 K,  MPa
Heat o fusion 35.3 kJ/mol
Heat o vapourisation 806.7 kJ/mol
Molar heat capacity 24.27 J/(mol·K)
Vapour pressur
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 3477 3773 4137 4579 5127 5823
Atomic properties
Oxidation states 6, 5, 4, 3, 2, 1, 0, −1, −2
(mildly acidic oxide)
Electronegativity Pauling scale: 2.36
Atomic radius empirical: 139 pm
Covalent radius 162±7 pm
Color lines in a spectral range
Miscellanea
Creestal structurbody-centred cubic (bcc)
Body-centered cubic creestal structur for tungsten
Speed o soond thin rod (annealed) 4620 m/s (at r.t.)
Thermal expansion 4.5 µm/(m·K) (at 25 °C)
Thermal conductivity 173 W/(m·K)
Electrical resistivity 52.8 n Ω·m (at 20 °C)
Magnetic orderin paramagnetic[2]
Young's modulus 411 GPa
Shear modulus 161 GPa
Bouk modulus 310 GPa
Poisson ratio 0.28
Mohs haurdness 7.5
Vickers haurdness 3430 MPa
Brinell haurdness 2570 MPa
CAS Nummer 7440-33-7
History
Diskivery Torbern Bergman (1781)
First isolation Juan José Elhuyar an Fausto Elhuyar (1783)
Main isotopes o tungsten
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct
180W 0.12% 1.8×1018 y α 176Hf
181W syn 121.2 d ε 181Ta
182W 26.50% >1.7×1020 y (α) 178Hf
183W 14.31% >8×1019 y (α) 179Hf
184W 30.64% >1.8×1020 y (α) 180Hf
185W syn 75.1 d β 185Re
186W 28.43% >4.1×1018 y (α) 182Hf
(ββ) 186Os
Decay modes in parentheses are predictit, but hae nae yet been observed
| references | in Wikidata

Tungsten, an aa kent as wolfram, is a chemical element wi the chemical seembol W an atomic nummer 74. The wird tungsten comes frae the Swadish leid tung sten directly translatable tae hivy stane,[3] tho the name is volfram in Swadish tae distinguish it frae Scheelite, which in Swadish is alternatively named tungsten.

References[eedit | eedit soorce]

  1. "Why does Tungsten not 'Kick' up an electron from the s sublevel ?". Retrieved 2008-06-15. 
  2. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.
  3. "Tungsten". Oxford English Dictionary (3rd ed.). Oxford University Press. September 2005.  (Subscription or UK public library membership required.)