టంగ్‌స్టన్, 00W
టంగ్‌స్టన్
Pronunciation/ˈtʌŋstən/ (TUNG-stən)
Allotropesα-tungsten (common), β-tungsten
Appearancegrayish white, lustrous
Standard atomic weight Ar°(W)
టంగ్‌స్టన్ in the periodic table
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 Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium
Mo

W

Sg
టాంటాలంటంగ్‌స్టన్రీనియం
Groupమూస:Infobox element/symbol-to-group/format
Periodperiod 6
Block  d-block
Electron configuration[Xe] 4f14 5d4 6s2[3]
Electrons per shell2, 8, 18, 32, 12, 2
Physical properties
Phase at STPsolid
Melting point3695 K ​(3422 °C, ​6192 °F)
Boiling point5828 K ​(5555 °C, ​10031 °F)
Density (near r.t.)19.25 g/cm3
when liquid (at m.p.)17.6 g/cm3
Critical point13892 K,  MPa
Heat of fusion35.3 kJ/mol
Heat of vaporization806.7 kJ/mol
Molar heat capacity24.27 J/(mol·K)
Vapor 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 (a mildly acidic oxide)
ElectronegativityPauling scale: 2.36
Atomic radiusempirical: 139 pm
Covalent radius162±7 pm
Color lines in a spectral range
Spectral lines of టంగ్‌స్టన్
Other properties
Natural occurrenceprimordial
Crystal structurebody-centered cubic (bcc)
Body-centered cubic crystal structure for టంగ్‌స్టన్
Speed of sound thin rod(annealed) 4620 m/s (at r.t.)
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[4]
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
History
DiscoveryTorbern Bergman (1781)
First isolationJuan José Elhuyar and Fausto Elhuyar (1783)
Symbol"W": from Wolfram, originally from Middle High German wolf-rahm 'wolf's foam' describing the mineral wolframite[5]
Isotopes of టంగ్‌స్టన్
Template:infobox టంగ్‌స్టన్ isotopes does not exist
 Category: టంగ్‌స్టన్
| references

References

  1. "Standard Atomic Weights: Tungsten". CIAAW. 1991.
  2. Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; et al. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry (in ఇంగ్లీష్). doi:10.1515/pac-2019-0603. ISSN 1365-3075.
  3. Berger, Dan. "Why does Tungsten not 'Kick' up an electron from the s sublevel ?". Bluffton College, USA.
  4. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.
  5. van der Krogt, Peter. "Wolframium Wolfram Tungsten". Elementymology& Elements Multidict. Archived from the original on 2010-01-23. Retrieved 2010-03-11.
  6. "Why does Tungsten not 'Kick' up an electron from the s sublevel ?". Retrieved 2008-06-15.


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