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Tantalum

Lát'ọwọ́ Wikipedia, ìwé ìmọ̀ ọ̀fẹ́
Chemical element with atomic number 73Àdàkọ:SHORTDESC:Chemical element with atomic number 73
Tantalum, 73Ta
Tantalum
Pípè/ˈtæntələm/​(TAN-təl-əm)
Ìhànsójúgray blue
Ìwúwo átọ̀mùAr, std(Ta)180.94788(2)[1]
Tantalum ní orítábìlì àyè
HydrogenHelium
LithiumBerylliumBoronCarbonNitrogenOxygenFluorineNeon
SodiumMagnesiumAluminiumSiliconPhosphorusSulfurChlorineArgon
PotassiumCalciumScandiumTitaniumVanadiumChromiumManganeseIronCobaltNickelCopperZincGalliumGermaniumArsenicSeleniumBromineKrypton
RubidiumStrontiumYttriumZirconiumNiobiumMolybdenumTechnetiumRutheniumRhodiumPalladiumSilverCadmiumIndiumTinAntimonyTelluriumIodineXenon
CaesiumBariumLanthanumCeriumPraseodymiumNeodymiumPromethiumSamariumEuropiumGadoliniumTerbiumDysprosiumHolmiumErbiumThuliumYtterbiumLutetiumHafniumTantalumTungstenRheniumOsmiumIridiumPlatinumGoldMercury (element)ThalliumLeadBismuthPoloniumAstatineRadon
FranciumRadiumActiniumThoriumProtactiniumUraniumNeptuniumPlutoniumAmericiumCuriumBerkeliumCaliforniumEinsteiniumFermiumMendeleviumNobeliumLawrenciumRutherfordiumDubniumSeaborgiumBohriumHassiumMeitneriumDarmstadtiumRoentgeniumCoperniciumNihoniumFleroviumMoscoviumLivermoriumTennessineOganesson
Nb
↑
Ta
↓
Db
hafnium ←tantalum →tungsten
Nọ́mbà átọ̀mù(Z)73
Ẹgbẹ́group 5
Àyèàyè 6
Àdìpọ̀Àdìpọ̀-d
Ẹ̀ka ẹ́límẹ́ntì Transition metal
Ìtò ẹ̀lẹ́ktrọ́nù[Xe] 4f14 5d3 6s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan2, 8, 18, 32, 11, 2
Àwọn ohun ìní ara
Ìfarahànat STPsolid
Ìgbà ìyọ́3290 K​(3017 °C,​5463 °F)
Ígbà ìhó5731 K​(5458 °C,​9856 °F)
Kíki(near r.t.)16.69 g/cm3
when liquid (at m.p.)15 g/cm3
Heat of fusion36.57 kJ/mol
Heat of732.8 kJ/mol
Molar heat capacity25.36 J/(mol·K)
 pressure
P (Pa)1101001 k10 k100 k
at T (K)329735973957439549395634
Atomic properties
Oxidation states−3, −1, +1, +2, +3, +4,+5Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
ElectronegativityPauling scale: 1.5
Atomic radiusempirical:146 pm
Covalent radius170±8 pm
Color lines in a spectral range
Color lines in a spectral range
Spectral lines of tantalum
Other properties
Natural occurrenceprimordial
Crystal structure​(bcc)
Body-centered cubic crystal structure for tantalum
Speed of soundthin rod3400 m/s(at 20 °C)
Thermal expansion6.3 µm/(m·K)(at 25 °C)
Thermal conductivity57.5 W/(m·K)
Electrical resistivity131 n Ω·m(at 20 °C)
Magnetic orderingparamagnetic[2]
Young's modulus186 GPa
Shear modulus69 GPa
Bulk modulus200 GPa
Poisson ratio0.34
Mohs hardness6.5
Vickers hardness873 MPa
Brinell hardness800 MPa
CAS Number7440-25-7
Mainisotopes of tantalum
Iso­topeAbun­danceHalf-life(t1/2)Decay modePro­duct
177Tasyn56.56hε1.166177Hf
178Tasyn2.36hε1.910178Hf
179Tasyn1.82aε0.110179Hf
180Tasyn8.125hε0.854180Hf
β−0.708180W
180mTa0.012%>1.2×1015y
(not observed)		ε0.929180Hf
β−0.783180W
IT0.075180Ta
181Ta99.988%181Ta isstable with 108neutrons
182Tasyn114.43dβ−1.814182W
183Tasyn5.1dβ−1.070183W
Àdàkọ:Category-inline
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[àtúnṣe |àtúnṣe àmìọ̀rọ̀]
  1. ↑Meija,Juris;Coplen,Tyler B.;Berglund,Michael;Brand,Willi A.;De Bièvre,Paul;Gröning,Manfred;Holden,Norman E.;Irrgeher,Johannaet al.(2016)."Atomic weights of the elements 2013 (IUPAC Technical Report)".Pure and Applied Chemistry88(3): 265–91.doi:10.1515/pac-2015-0305. 
  2. ↑Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.
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