د ويکيپېډيا، وړیا پوهنغونډ له خوا
Terbium, 65 Tb Pronunciation / ˈ t ɜr b i ə m / TUR -bee-əmAppearance silvery white اټومي شمیره (Z ) 65 گروپ , پیریود group n/a , period 6 بلاک f-block Element category lanthanide معياري اټومي وزن (A r ) کينډۍ:Val [ ۱] Electron configuration [Xe ] 4f9 6s2 Electrons per shell
2, 8, 18, 27, 8, 2 حالت (at STP ) جامد دويلې کيدو ټکى 1629 K (1356 °C, 2473 °F) يشنا ټکی 3396 K (3123 °C, 5653 °F) Density near r.t. 8.23 g/cm3 when liquid, at m.p. 7.65 g/cm3 Heat of fusion 10.15 kJ/mol Heat of vaporization 391 kJ/mol Molar heat capacity 28.91 J/(mol·K) Vapor pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
1789
1979
(2201)
(2505)
(2913)
(3491)
Oxidation states 4, 3 , 2, 1 (a weakly basic oxide)Electronegativity Pauling scale: 1.2 (?) Ionization energies 1st: 565.8 kJ/mol 2nd: 1110 kJ/mol 3rd: 2114 kJ/mol Atomic radius empirical: 177 pm Covalent radius 194±5 pm Crystal structure hexagonal close-packed (hcp)Hexagonal close packed crystal structure for terbium Speed of sound thin rod 2620 m/s (at 20 °C) Thermal expansion at r.t. α, poly: 10.3 µm/(m·K) د تودوخې تېرېدنه 11.1 W/(m·K) Electrical resistivity α, poly: 1.150 µΩ·m (at r.t. ) Magnetic ordering paramagnetic at 300 K Magnetic susceptibility (χ mol ) +146,000·10−6 cm3 /mol (273 K)[ ۲] Young's modulus α form: 55.7 GPa Shear modulus α form: 22.1 GPa Bulk modulus α form: 38.7 GPa Poisson ratio α form: 0.261 Vickers hardness 450–865 MPa Brinell hardness 675–1200 MPa CAS Number 7440-27-9 Naming after Ytterby (Sweden), where it was mined Discovery and first isolationCarl Gustaf Mosander (1842)
| references | in Wikidata
تېربيوم (په انگرېزي : Terbium ) له کیمیاوي عناصرو څخه یو دی چې په تناوبي جدول کې د Tb سمبول او ۶۵ اتمي شمېرې په وسیله ښودل شوی دی.
↑ Meija, J.; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)" . Pure Appl. Chem. 88 (3): 265–91. doi :10.1515/pac-2015-0305 .
↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics . Boca Raton, Florida: Chemical Rubber Company Publishing. مخونه E110. د کتاب نړيواله کره شمېره 0-8493-0464-4 .
دا ليکنه نابشپړه ده، تاسې ددې ليکنې په بشپړولو کې د ويکيپېډيا سره مرسته کولای شئ.