Lát'ọwọ́ Wikipedia, ìwé ìmọ̀ ọ̀fẹ́
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Tantalum, 73 Ta Tantalum Pípè / ˈ t æ n t ə l ə m / (TAN -təl-əm ) Ìhànsójú gray blue Ìwúwo átọ̀mù A r, std (Ta) 180.9478 8(2) [1] Tantalum ní orí tábìlì àyè
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) pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
3297
3597
3957
4395
4939
5634
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 range Spectral lines of tantalumOther 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 [2] 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 | references
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.