تانتاليوم

Tantalum, ₇₃Ta
	Spectral lines of tantalum
عمومي خواص
Pronunciation	/ˈtæntələm/; TAN-təl-əm ; previously: /tænˈtæliəm/; tan-TAL-ee-əm
Appearance	gray blue
Tantalum په دوراني جدول کې
hafnium ← tantalum → tungsten	‍
اټومي شمیره (Z)	73
گروپ, پیریود	group 5, period 6
بلاک	d-block
Element category	transition metal
معياري اټومي وزن (Ar)	کينډۍ:Val
Electron configuration	[Xe] 4f14 5d3 6s2
Electrons per shell	2, 8, 18, 32, 11, 2
فزیکي خواص
حالت (at STP)	جامد
دويلې کيدو ټکى	3290 K (3017 °C, 5463 °F)
يشنا ټکی	5731 K (5458 °C, 9856 °F)
Density near r.t.	16.69 g/cm3
when liquid, at m.p.	15 g/cm3
Heat of fusion	36.57 kJ/mol
Heat of vaporization	753 kJ/mol
Molar heat capacity	25.36 J/(mol·K)
اټومي خواص
Oxidation states	5, 4, 3, 2, 1, −1, −3 (a mildly acidic oxide)
Electronegativity	Pauling scale: 1.5
Ionization energies	1st: 761 kJ/mol ; 2nd: 1500 kJ/mol ; ;
Atomic radius	empirical: 146 pm
Covalent radius	170±8 pm
Miscellanea
Crystal structure	body-centered cubic (bcc) Body-centered cubic crystal structure for tantalum; α-Ta
Crystal structure	tetragonal Tetragonal crystal structure for tantalum; β-Ta
Speed of sound thin rod	3400 m/s (at 20 °C)
Thermal expansion	6.3 µm/(m·K) (at 25 °C)
د تودوخې تېرېدنه	57.5 W/(m·K)
Electrical resistivity	131 nΩ·m (at 20 °C)
Magnetic ordering	paramagnetic
Magnetic susceptibility (χmol)	+154.0·10−6 cm3/mol (293 K)
Young's modulus	186 GPa
Shear modulus	69 GPa
Bulk modulus	200 GPa
Poisson ratio	0.34
Mohs hardness	6.5
Vickers hardness	870–1200 MPa
Brinell hardness	440–3430 MPa
CAS Number	7440-25-7
History
Discovery	Anders Gustaf Ekeberg (1802)
Recognized as a distinct element by	Heinrich Rose (1844)
Main isotopes of tantalum
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تانتاليوم (په انگرېزي: Tantalum) له کیمیاوي عناصرو څخه یو دی چې په تناوبي جدول کې د Ta سمبول او v۳ اتمي شمېرې په وسیله ښودل شوی دی.

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سرچينې

↑ Meija, J.; Coplen, T. B. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure Appl. Chem. 88 (3): 265–91. doi:10.1515/pac-2015-0305. {{cite journal}}: Unknown parameter |displayauthors= ignored (|display-authors= suggested) (help)
↑ ^۲٫۰ ^۲٫۱ 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. doi:10.1107/S0567740873004140.
↑ 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.
↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.

دا ليکنه نابشپړه ده، تاسې ددې ليکنې په بشپړولو کې د ويکيپېډيا سره مرسته کولای شئ.

[CIAAW2016-1] Meija, J.; Coplen, T. B. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure Appl. Chem. 88 (3): 265–91. doi:10.1515/pac-2015-0305. {{cite journal}}: Unknown parameter |displayauthors= ignored (|display-authors= suggested) (help)

[crystal_structure-2] ۲٫۰ ^۲٫۱ 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. doi:10.1107/S0567740873004140.

[magnet-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.

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