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Chemical element with atomic number 74Àdàkọ:SHORTDESC:Chemical element with atomic number 74
Tungsten, 74W
Tungsten
Pípè/ˈtʌŋstən/ ​(TUNG-stən)
Ìhànsójúgrayish white, lustrous
Ìwúwo átọ̀mù Ar, std(W)183.84(1)[1]
Tungsten ní orítábìlì àyè
HydrogenHelium
LithiumBerylliumBoronCarbonNitrogenOxygenFluorineNeon
SodiumMagnesiumAluminiumSiliconPhosphorusSulfurChlorineArgon
PotassiumCalciumScandiumTitaniumVanadiumChromiumManganeseIronCobaltNickelCopperZincGalliumGermaniumArsenicSeleniumBromineKrypton
RubidiumStrontiumYttriumZirconiumNiobiumMolybdenumTechnetiumRutheniumRhodiumPalladiumSilverCadmiumIndiumTinAntimonyTelluriumIodineXenon
CaesiumBariumLanthanumCeriumPraseodymiumNeodymiumPromethiumSamariumEuropiumGadoliniumTerbiumDysprosiumHolmiumErbiumThuliumYtterbiumLutetiumHafniumTantalumTungstenRheniumOsmiumIridiumPlatinumGoldMercury (element)ThalliumLeadBismuthPoloniumAstatineRadon
FranciumRadiumActiniumThoriumProtactiniumUraniumNeptuniumPlutoniumAmericiumCuriumBerkeliumCaliforniumEinsteiniumFermiumMendeleviumNobeliumLawrenciumRutherfordiumDubniumSeaborgiumBohriumHassiumMeitneriumDarmstadtiumRoentgeniumCoperniciumNihoniumFleroviumMoscoviumLivermoriumTennessineOganesson
Mo
↑
W
↓
Sg
tantalum ←tungsten →rhenium
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
Ìfarahànat 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 of806.7 kJ/mol
Molar heat capacity24.27 J/(mol·K)
 pressure
P (Pa)1101001 k10 k100 k
at T (K)347737734137457951275823
Atomic properties
Oxidation states−4, −2, −1, 0, +1, +2, +3,+4, +5,+6Àdàkọ: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
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
Mainisotopes of tungsten
Iso­topeAbun­danceHalf-life(t1/2)Decay modePro­duct
180W0.12%1.8×1018 yα2.516176Hf
181Wsyn121.2dε0.188181Ta
182W26.50%182W isstable with 108neutrons
183W14.31%183W isstable with 109neutrons
184W30.64%184W isstable with 110neutrons
185Wsyn75.1dβ−0.433185Re
186W28.43%186W isstable with 112neutrons
Àdàkọ:Category-inline
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  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 ?". Retrieved2008-06-15. 
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