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Tungsten,  74W
Wolfram evaporated crystals and 1cm3 cube.jpg
General properties
Name, seembol tungsten, W
Pronunciation /ˈtʌŋstən/ TUNG-stən;
/ˈwʊlfrəm/ WUUL-frəm
Appearance grayish white, lustrous
Tungsten in the periodic cairt
Hydrogen (diatomic nonmetal)
Helium (noble gas)
Lithium (alkali metal)
Beryllium (alkaline yird metal)
Boron (metalloid)
Carbon (polyatomic nonmetal)
Nitrogen (diatomic nonmetal)
Oxygen (diatomic nonmetal)
Fluorine (diatomic nonmetal)
Neon (noble gas)
Sodium (alkali metal)
Magnesium (alkaline yird metal)
Aluminium (post-transeetion metal)
Silicon (metalloid)
Phosphorus (polyatomic nonmetal)
Sulfur (polyatomic nonmetal)
Chlorine (diatomic nonmetal)
Argon (noble gas)
Potassium (alkali metal)
Calcium (alkaline yird metal)
Scandium (transeetion metal)
Titanium (transeetion metal)
Vanadium (transeetion metal)
Chromium (transeetion metal)
Manganese (transeetion metal)
Iron (transeetion metal)
Cobalt (transeetion metal)
Nickel (transeetion metal)
Copper (transeetion metal)
Zinc (transeetion metal)
Gallium (post-transeetion metal)
Germanium (metalloid)
Arsenic (metalloid)
Selenium (polyatomic nonmetal)
Bromine (diatomic nonmetal)
Krypton (noble gas)
Rubidium (alkali metal)
Strontium (alkaline yird metal)
Yttrium (transeetion metal)
Zirconium (transeetion metal)
Niobium (transeetion metal)
Molybdenum (transeetion metal)
Technetium (transeetion metal)
Ruthenium (transeetion metal)
Rhodium (transeetion metal)
Palladium (transeetion metal)
Silver (transeetion metal)
Cadmium (transeetion metal)
Indium (post-transeetion metal)
Tin (post-transeetion metal)
Antimony (metalloid)
Tellurium (metalloid)
Iodine (diatomic nonmetal)
Xenon (noble gas)
Caesium (alkali metal)
Barium (alkaline yird metal)
Lanthanum (lanthanide)
Cerium (lanthanide)
Praseodymium (lanthanide)
Neodymium (lanthanide)
Promethium (lanthanide)
Samarium (lanthanide)
Europium (lanthanide)
Gadolinium (lanthanide)
Terbium (lanthanide)
Dysprosium (lanthanide)
Holmium (lanthanide)
Erbium (lanthanide)
Thulium (lanthanide)
Ytterbium (lanthanide)
Lutetium (lanthanide)
Hafnium (transeetion metal)
Tantalum (transeetion metal)
Tungsten (transeetion metal)
Rhenium (transeetion metal)
Osmium (transeetion metal)
Iridium (transeetion metal)
Platinum (transeetion metal)
Gold (transeetion metal)
Mercury (transeetion metal)
Thallium (post-transeetion metal)
Lead (post-transeetion metal)
Bismuth (post-transeetion metal)
Polonium (post-transeetion metal)
Astatine (metalloid)
Radon (noble gas)
Francium (alkali metal)
Radium (alkaline yird metal)
Actinium (actinide)
Thorium (actinide)
Protactinium (actinide)
Uranium (actinide)
Neptunium (actinide)
Plutonium (actinide)
Americium (actinide)
Curium (actinide)
Berkelium (actinide)
Californium (actinide)
Einsteinium (actinide)
Fermium (actinide)
Mendelevium (actinide)
Nobelium (actinide)
Lawrencium (actinide)
Rutherfordium (transeetion metal)
Dubnium (transeetion metal)
Seaborgium (transeetion metal)
Bohrium (transeetion metal)
Hassium (transeetion metal)
Meitnerium (unkent chemical properties)
Darmstadtium (unkent chemical properties)
Roentgenium (unkent chemical properties)
Copernicium (transeetion metal)
Ununtrium (unkent chemical properties)
Flerovium (post-transeetion metal)
Ununpentium (unkent chemical properties)
Livermorium (unkent chemical properties)
Ununseptium (unkent chemical properties)
Ununoctium (unkent chemical properties)


Atomic nummer 74
Staundart atomic wicht (Ar) 183.84
Element category   transeetion metal
Group, block group 6, d-block
Period period 6
Electron configuration [Xe] 4f14 5d4 6s2[1]
per shell
2, 8, 18, 32, 12, 2
Pheesical properties
Phase solid
Meltin pynt 3695 K ​(3422 °C, ​6192 °F)
Boilin 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 806.7 kJ/mol
Molar heat capacity 24.27 J/(mol·K)
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
Crystal structur body-centered cubic (bcc)
Body-centered cubic crystal structure 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
Bulk modulus 310 GPa
Poisson ratio 0.28
Mohs haurdness 7.5
Vickers haurdness 3430 MPa
Brinell haurdness 2570 MPa
CAS Registry Nummer 7440-33-7
Discovery Torbern Bergman (1781)
First isolation Juan José Elhuyar an Fausto Elhuyar (1783)
Maist stable isotopes
Main article: Isotopes o tungsten
iso NA hauf-life DM DE (MeV) DP
180W 0.12% 1.8×1018 y α 2.516 176Hf
181W syn 121.2 d ε 0.188 181Ta
182W 26.50% >1.7×1020 y (α) 1.772 178Hf
183W 14.31% >8×1019 y (α) 1.680 179Hf
184W 30.64% >1.8×1020 y (α) 1.123 180Hf
185W syn 75.1 d β 0.433 185Re
186W 28.43% >4.1×1018 y (α) 1.656 182Hf
(ββ) - 186Os
Decay modes in parentheses are predictit, but hae nae yet been observed
· references

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. 2001.