Europium

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Europium, 63Eu
EU5P17G-crop.jpg
Europium
Pípè /jʊəˈrpiəm/ (yoor-OH-pee-əm)
Ìhànsójúsilvery white, but rarely seen without oxide discoloration
Ìwúwo átọ̀mù Ar, std(Eu)151.964(1)[1]
Europium 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
-

Eu

Am
samariumeuropiumgadolinium
Nọ́mbà átọ̀mù (Z)63
Ẹgbẹ́group n/a
Àyèàyè 6
Àdìpọ̀Àdìpọ̀-f
Ẹ̀ka ẹ́límẹ́ntì  Lanthanide
Ìtò ẹ̀lẹ́ktrọ́nù[Xe] 4f7 6s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan2, 8, 18, 25, 8, 2
Àwọn ohun ìní ara
Ìfarahàn at STPsolid
Ìgbà ìyọ́1099 K ​(826 °C, ​1519 °F)
Ígbà ìhó1802 K ​(1529 °C, ​2784 °F)
Kíki (near r.t.)5.264 g/cm3
when liquid (at m.p.)5.13 g/cm3
Heat of fusion9.21 kJ/mol
Heat of 176 kJ/mol
Molar heat capacity27.66 J/(mol·K)
 pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 863 957 1072 1796    
Atomic properties
Oxidation states+1, +2, +3 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
ElectronegativityPauling scale: ? 1.2
Atomic radiusempirical: 180 pm
Covalent radius198±6 pm
Color lines in a spectral range
Spectral lines of europium
Other properties
Natural occurrenceprimordial
Crystal structure ​(bcc)
Body-centered cubic crystal structure for europium
Thermal expansion(r.t.) (poly)
35.0 µm/(m·K)
Thermal conductivityest. 13.9 W/(m·K)
Electrical resistivity(r.t.) (poly) 0.900 µ Ω·m
Magnetic orderingparamagnetic[2]
Young's modulus18.2 GPa
Shear modulus7.9 GPa
Bulk modulus8.3 GPa
Poisson ratio0.152
Vickers hardness167 MPa
CAS Number7440-53-1
Main isotopes of europium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct
150Eu syn 36.9 y ε 2.261 150Sm
151Eu 47.8% 5×1018 y α   147Pm
152Eu syn 13.516 y ε 1.874 152Sm
β 1.819 152Gd
153Eu 52.2% 153Eu is stable with 90 neutrons
Àdàkọ:Category-inline
| references


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