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Tungsten, 74W
Wolfram evaporated crystals and 1cm3 cube.jpg
Tungsten
Pípè /ˈtʌŋstən/ (TUNG-stən)
Ìhànsójúgrayish white, lustrous
Ìwúwo átọ̀mù Ar, std(W)183.84(1)[1]
Tungsten ní orí tábìlì àyè
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 Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver 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 Mercury (element) Thallium Lead 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 Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
Mo

W

Sg
tantalumtungstenrhenium
Nọ́mbà átọ̀mù (Z)74
Ẹgbẹ́group 6
Àyèàyè 6
Àdìpọ̀Àdìpọ̀-d
Ẹ̀ka ẹ́límẹ́ntì  Transition metal
Ìtò ẹ̀lẹ́ktrọ́nù[Xe] 4f14 5d4 6s2[2]
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan2, 8, 18, 32, 12, 2
Àwọn ohun ìní ara
Ìfarahàn at STPsolid
Ìgbà ìyọ́3695 K ​(3422 °C, ​6192 °F)
Ígbà ìhó5828 K ​(5555 °C, ​10031 °F)
Kíki (near r.t.)19.25 g/cm3
when liquid (at m.p.)17.6 g/cm3
Critical point13892 K,  MPa
Heat of fusion52.31 kJ/mol
Heat of 806.7 kJ/mol
Molar heat capacity24.27 J/(mol·K)
 pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 3477 3773 4137 4579 5127 5823
Atomic properties
Oxidation states−4, −2, −1, 0, +1, +2, +3, +4, +5, +6 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
ElectronegativityPauling scale: 2.36
Atomic radiusempirical: 139 pm
Covalent radius162±7 pm
Color lines in a spectral range
Spectral lines of tungsten
Other properties
Natural occurrenceprimordial
Crystal structure ​(bcc)
Body-centered cubic crystal structure for tungsten
Thermal expansion4.5 µm/(m·K) (at 25 °C)
Thermal conductivity173 W/(m·K)
Electrical resistivity52.8 n Ω·m (at 20 °C)
Magnetic orderingparamagnetic[3]
Young's modulus411 GPa
Shear modulus161 GPa
Bulk modulus310 GPa
Poisson ratio0.28
Mohs hardness7.5
Vickers hardness3430 MPa
Brinell hardness2570 MPa
CAS Number7440-33-7
Main isotopes of tungsten
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct
180W 0.12% 1.8×1018 y α 2.516 176Hf
181W syn 121.2 d ε 0.188 181Ta
182W 26.50% 182W is stable with 108 neutrons
183W 14.31% 183W is stable with 109 neutrons
184W 30.64% 184W is stable with 110 neutrons
185W syn 75.1 d β 0.433 185Re
186W 28.43% 186W is stable with 112 neutrons
Àdàkọ:Category-inline
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Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. doi:10.1515/pac-2015-0305. 
  2. Berger, Dan. "Why does Tungsten not 'Kick' up an electron from the s sublevel ?". Bluffton College, USA. 
  3. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.
  4. "Why does Tungsten not 'Kick' up an electron from the s sublevel ?". Retrieved 2008-06-15.