KidzSearch Image Safe Search   



Tantalum,  73Ta
Template:Infobox element/symbol-to-top-image/alt
General properties
Pronunciation/ˈænələm/ (TAN-təl-əm)
Appearancegray blue
Standard atomic weight (Ar, standard)180.94788(2)
Tantalum in the periodic table
HydrogenHelium
LithiumBerylliumBoronCarbonNitrogenOxygenFluorineNeon
SodiumMagnesiumAluminiumSiliconPhosphorusSulfurChlorineArgon
PotassiumCalciumScandiumTitaniumVanadiumChromiumManganeseIronCobaltNickelCopperZincGalliumGermaniumArsenicSeleniumBromineKrypton
RubidiumStrontiumYttriumZirconiumNiobiumMolybdenumTechnetiumRutheniumRhodiumPalladiumSilverCadmiumIndiumTinAntimonyTelluriumIodineXenon
CaesiumBariumLanthanumCeriumPraseodymiumNeodymiumPromethiumSamariumEuropiumGadoliniumTerbiumDysprosiumHolmiumErbiumThuliumYtterbiumLutetiumHafniumTantalumTungstenRheniumOsmiumIridiumPlatinumGoldMercury (element)ThalliumLeadBismuthPoloniumAstatineRadon
FranciumRadiumActiniumThoriumProtactiniumUraniumNeptuniumPlutoniumAmericiumCuriumBerkeliumCaliforniumEinsteiniumFermiumMendeleviumNobeliumLawrenciumRutherfordiumDubniumSeaborgiumBohriumHassiumMeitneriumDarmstadtiumRoentgeniumCoperniciumNihoniumFleroviumMoscoviumLivermoriumTennessineOganesson
Nb

Ta

Db
hafniumtantalumtungsten
Atomic number (Z)73
Groupgroup 5
Periodperiod 6
Blockd-block
Element category  transition metal
Electron configuration[Xe] 4f14 5d3 6s2
Electrons per shell
2, 8, 18, 32, 11, 2
Physical properties
Phase at STPTa: Solid
Melting point3290 K ​(3017 °C, ​5463 °F)
Boiling point5731 K ​(5458 °C, ​9856 °F)
Density (near r.t.)16.69 g/cm3
when liquid (at m.p.)15 g/cm3
Heat of fusion36.57 kJ/mol
Heat of vaporization753 kJ/mol
Molar heat capacity25.36 J/(mol·K)
Vapor pressure
P (Pa)1101001 k10 k100 k
at T (K)329735973957439549395634
Atomic properties
Oxidation states−3, −1, +1, +2, +3, +4, +5 (a mildly acidic oxide)
ElectronegativityPauling scale: 1.5
Ionization energies
  • 1st: 761 kJ/mol
  • 2nd: 1500 kJ/mol
Atomic radiusempirical: 146 pm
Covalent radius170±8 pm
Color lines in a spectral range
Spectral lines of tantalum
Other properties
Natural occurrenceTa: Primordial
Crystal structurebody-centered cubic (bcc)
Body-centered cubic crystal structure for tantalum

α-Ta
Crystal structuretetragonal
Tetragonal crystal structure for tantalum

β-Ta
Speed of sound thin rod3400 m/s (at 20 °C)
Thermal expansion6.3 µm/(m·K) (at 25 °C)
Thermal conductivity57.5 W/(m·K)
Electrical resistivity131 nΩ·m (at 20 °C)
Magnetic orderingparamagnetic
Magnetic susceptibility+154.0·10−6 cm3/mol (293 K)
Young's modulus186 GPa
Shear modulus69 GPa
Bulk modulus200 GPa
Poisson ratio0.34
Mohs hardness6.5
Vickers hardness870–1200 MPa
Brinell hardness440–3430 MPa
CAS Number7440-25-7
History
DiscoveryAnders Gustaf Ekeberg (1802)
Recognized as a distinct element byHeinrich Rose (1844)
Main isotopes of tantalum
Iso­topeAbun­danceHalf-life (1/2)Decay modePro­duct
177Tasyn56.56 hε177Hf
178Tasyn2.36 hε178Hf
179Tasyn1.82 yε179Hf
180Tasyn8.125 hε180Hf
β180W
180mTa0.012%stable
181Ta99.988%stable
182Tasyn114.43 dβ182W
183Tasyn5.1 dβ183W
| references
Tantalum in a glass tube

Tantalum is a chemical element. Tantalum was named tantalium. It has the chemical symbol Ta. It has the atomic number 73. It is a rare metal. It is hard and blue-gray. In chemistry it is placed in a group of metal elements named the transition metals.

Tantalum does not easily corrode. It is found in the mineral tantaliteview more...





   Related Content
    • tantalum nitride
    • tantalum nitride types
    • tantalum uses
    • tantalum flammability
    • tantalum the element
    • tantalum carbide
    • tantalum carbide coating
    • tantalum facts
    • tantalum mining


Not Finding Your Answer?
Post It On KidzTalk Homework Help


   Report a search problem







COMPANY RESOURCES LINKS SOCIAL
contact us education daily journal home facebook
about us make us your default search kidztalk twitter  
terms/privacy blocking websites kidznet pinterest  
advertise teacher zone wiki    
media link to us learning sites    
business / api solutions add a site image search    
affiliate program kidzsearch apps kidztube    
play youtube on kidzsearch games    
  voice search music    
  report a problem cool facts    
  settings news    
    search help    
       
         










 mobile version

      Copyright 2005-2024 KidzSearch.com