Tantalum
English: Tantalum

Tantalum,  73Ta
Tantalum single crystal and 1cm3 cube.jpg
General properties
Pronunciationm/ (TAN-təl-əm)
Appearancegray blue
Standard atomic weight (Ar, standard)180.94788(2)[1]
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 STPsolid
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)
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 occurrenceprimordial
Crystal structure ​body-centered cubic (bcc)[2]
Body-centered cubic crystal structure for tantalum

α-Ta
Crystal structure ​tetragonal[2]
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[3]
Magnetic susceptibility+154.0·10−6 cm3/mol (293 K)[4]
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 (t1/2)Decay modePro­duct
177Tasyn56.56 hεHf
178Tasyn2.36 hεHf
179Tasyn1.82 yεHf
180Tasyn8.125 hεHf
W
180mTa0.012%stable
181Ta99.988%stable
182Tasyn114.43 dβW
183Tasyn5.1 dβW
| 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 tantalite.

  • sources

Sources

  1. Meija, J.; Coplen, T. B.; Berglund, M.; Brand, W.A.; De Bièvre, P.; Gröning, M.; Holden, N.E.; Irrgeher, J. et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265-91. https://www.degruyter.com/downloadpdf/j/pac.2016.88.issue-3/pac-2015-0305/pac-2015-0305.xml. 
  2. 2.0 2.1 Moseley, P. T.; Seabrook, C. J. (1973). "The crystal structure of β-tantalum". Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry 29 (5): 1170–1171. 10.1107/S0567740873004140. 
  3. Lide, D. R., ed. (2005). "Magnetic susceptibility of the elements and inorganic compounds". CRC Handbook of Chemistry and Physics (PDF) (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.
  4. Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.
Other Languages
Afrikaans: Tantaal
አማርኛ: ታንታለም
العربية: تانتالوم
aragonés: Tantal
armãneashti: Tantalu
azərbaycanca: Tantal
Bân-lâm-gú: Tantalum
беларуская: Тантал
беларуская (тарашкевіца)‎: Танталь
भोजपुरी: टैंटलम
български: Тантал (елемент)
བོད་ཡིག: ཊན་ཊ་ལམ།
bosanski: Tantal
brezhoneg: Tantalom
català: Tàntal
Cebuano: Tantalyo
čeština: Tantal
corsu: Tantaliu
Cymraeg: Tantalwm
dansk: Tantal
Deutsch: Tantal
eesti: Tantaal
Ελληνικά: Ταντάλιο
English: Tantalum
Esperanto: Tantalo
euskara: Tantalo
فارسی: تانتال
Fiji Hindi: Tantalum
français: Tantale (chimie)
furlan: Tantali
Gaeilge: Tantalam
Gaelg: Tantalum
Gàidhlig: Tantalum
galego: Tántalo
ગુજરાતી: ટેન્ટેલમ
客家語/Hak-kâ-ngî: Tantalum
хальмг: Тантал
한국어: 탄탈럼
հայերեն: Տանտալ
हिन्दी: टैंटेलम
Ido: Tantalo
Bahasa Indonesia: Tantalum
interlingua: Tantalo
íslenska: Tantal
italiano: Tantalio
עברית: טנטלום
Jawa: Tantalum
Kabɩyɛ: Tantalɩ
ಕನ್ನಡ: ಟಾಂಟಲಮ್
ქართული: ტანტალი
қазақша: Тантал
Kiswahili: Tantali
Kreyòl ayisyen: Tantal
kurdî: Tantal
Кыргызча: Тантал
кырык мары: Тантал (элемент)
Latina: Tantalum
latviešu: Tantals
Lëtzebuergesch: Tantal
lietuvių: Tantalas
Ligure: Tantalio
Limburgs: Tantalum
Livvinkarjala: Tantal
la .lojban.: jinmrtantalu
lumbaart: Tantalio
magyar: Tantál
македонски: Тантал
മലയാളം: ടാന്റലം
मराठी: टॅन्टेलम
Bahasa Melayu: Tantalum
Mìng-dĕ̤ng-ngṳ̄: Tantalum
монгол: Тантал
Nederlands: Tantaal
नेपाली: टाण्टलम
日本語: タンタル
Nordfriisk: Tantaal
norsk: Tantal
norsk nynorsk: Tantal
ଓଡ଼ିଆ: ଟାଣ୍ଟାଲମ
oʻzbekcha/ўзбекча: Tantal (unsur)
ਪੰਜਾਬੀ: ਟੈਂਟਲਮ
پنجابی: ٹینٹالم
Piemontèis: Tantali
română: Tantal
Runa Simi: Tantalyu
संस्कृतम्: टाण्टलम
Scots: Tantalum
Seeltersk: Tantal
shqip: Tantali
sicilianu: Tantaliu
slovenčina: Tantal
slovenščina: Tantal (element)
Soomaaliga: Tantalum
کوردی: تانتالۆم
српски / srpski: Тантал
srpskohrvatski / српскохрватски: Tantalijum
suomi: Tantaali
svenska: Tantal
Tagalog: Tantalo
татарча/tatarça: Тантал
తెలుగు: టేంటలం
Türkçe: Tantal
اردو: ٹینٹلم
ئۇيغۇرچە / Uyghurche: تانتال
vepsän kel’: Tantal
Tiếng Việt: Tantan
文言:
Winaray: Tantalyo
ייִדיש: טאנטאלום
Yorùbá: Tantalum
粵語:
中文: