Terbium

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Terbium, 65Tb
Terbium-2.jpg
Terbium
Pípè /ˈtɜːrbiəm/ (TUR-bee-əm)
Ìhànsójúsilvery white
Ìwúwo átọ̀mù Ar, std(Tb)158.925354(8)[1]
Terbium ní orí tábìlì àyè
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
-

Tb

Bk
gadoliniumterbiumdysprosium
Nọ́mbà átọ̀mù (Z)65
Ẹgbẹ́group n/a
Àyèàyè 6
Àdìpọ̀Àdìpọ̀-f
Ẹ̀ka ẹ́límẹ́ntì  Lanthanide
Ìtò ẹ̀lẹ́ktrọ́nù[Xe] 4f9 6s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan2, 8, 18, 27, 8, 2
Àwọn ohun ìní ara
Ìfarahàn at STPsolid
Ìgbà ìyọ́1629 K ​(1356 °C, ​2473 °F)
Ígbà ìhó3503 K ​(3230 °C, ​5846 °F)
Kíki (near r.t.)8.23 g/cm3
when liquid (at m.p.)7.65 g/cm3
Heat of fusion10.15 kJ/mol
Heat of 293 kJ/mol
Molar heat capacity28.91 J/(mol·K)
 pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 1789 1979 (2201) (2505) (2913) (3491)
Atomic properties
Oxidation states0,[2] +1, +2, +3, +4 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
ElectronegativityPauling scale: ? 1.2
Atomic radiusempirical: 177 pm
Covalent radius194±5 pm
Color lines in a spectral range
Spectral lines of terbium
Other properties
Natural occurrenceprimordial
Crystal structurehexagonal
Hexagonal crystal structure for terbium
Speed of sound thin rod2620 m/s (at 20 °C)
Thermal expansion(r.t.) (α, poly) 10.3 µm/(m·K)
Thermal conductivity11.1 W/(m·K)
Electrical resistivity(r.t.) (α, poly) 1.150 µ Ω·m
Magnetic orderingparamagnetic at 300 K
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 hardness863 MPa
Brinell hardness677 MPa
CAS Number7440-27-9
Main isotopes of terbium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct
157Tb syn 71 y ε 0.060 157Gd
158Tb syn 180 y ε 1.220 158Gd
β 0.937 158Dy
159Tb 100% 159Tb is stable with 94 neutrons
Àdàkọ:Category-inline
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Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. 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. 
  2. Yttrium and all lanthanides except Ce, Pm, Eu, Tm, Yb have been observed in the oxidation state 0 in bis(1,3,5-tri-t-butylbenzene) complexes, see Cloke, F. Geoffrey N. (1993). "Zero Oxidation State Compounds of Scandium, Yttrium, and the Lanthanides". Chem. Soc. Rev. 22: 17–24. doi:10.1039/CS9932200017.