Tantalum

Tantalum, ₇₃Ta
Tantalum
Pípè	/ˈtæntələm/ (TAN-təl-əm)
Ìhànsójú	gray blue
Ìwúwo átọ̀mù Ar, std(Ta)	180.94788(2)
Tantalum ní orí tábìlì àyè
	hafnium ← tantalum → tungsten
Nọ́mbà átọ̀mù (Z)	73
Ẹgbẹ́	group 5
Àyè	àyè 6
Àdìpọ̀	Àdìpọ̀-d
Ẹ̀ka ẹ́límẹ́ntì	Transition metal
Ìtò ẹ̀lẹ́ktrọ́nù	[Xe] 4f14 5d3 6s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 18, 32, 11, 2
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	3290 K (3017 °C, 5463 °F)
Ígbà ìhó	5731 K (5458 °C, 9856 °F)
Kíki (near r.t.)	16.69 g/cm3
when liquid (at m.p.)	15 g/cm3
Heat of fusion	36.57 kJ/mol
Heat of	732.8 kJ/mol
Molar heat capacity	25.36 J/(mol·K)
Atomic properties
Oxidation states	−3, −1, +1, +2, +3, +4, +5 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: 1.5
Atomic radius	empirical: 146 pm
Covalent radius	170±8 pm
	Color lines in a spectral rangeSpectral lines of tantalum
Other properties
Natural occurrence	primordial
Crystal structure	(bcc)
Speed of sound thin rod	3400 m/s (at 20 °C)
Thermal expansion	6.3 µm/(m·K) (at 25 °C)
Thermal conductivity	57.5 W/(m·K)
Electrical resistivity	131 n Ω·m (at 20 °C)
Magnetic ordering	paramagnetic
Young's modulus	186 GPa
Shear modulus	69 GPa
Bulk modulus	200 GPa
Poisson ratio	0.34
Mohs hardness	6.5
Vickers hardness	873 MPa
Brinell hardness	800 MPa
CAS Number	7440-25-7
Main isotopes of tantalum
	Àdàkọ:Category-inline; wo; ọ̀rọ̀; àtúnṣe; \| references

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Itokasi

↑ 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.
↑ Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.