Europium

Europium, ₆₃Eu

Europium
Pípè	/jʊəˈroʊpiəm/ ​(yoor-OH-pee-əm)
Ìhànsójú	silvery 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 samarium ← europium → gadolinium
Nọ́mbà átọ̀mù (Z)	63
Ẹgbẹ́	group n/a
Àyè	àyè 6
Àdìpọ̀	Àdìpọ̀-f
Ẹ̀ka ẹ́límẹ́ntì	Lanthanide
Ìtò ẹ̀lẹ́ktrọ́nù	[Xe] 4f7 6s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 18, 25, 8, 2
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	1099 K ​(826 °C, ​1519 °F)
Ígbà ìhó	1802 K ​(1529 °C, ​2784 °F)
Kíki (near r.t.)	5.264 g/cm3
when liquid (at m.p.)	5.13 g/cm3
Heat of fusion	9.21 kJ/mol
Heat of	176 kJ/mol
Molar heat capacity	27.66 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
Electronegativity	Pauling scale: ? 1.2
Atomic radius	empirical: 180 pm
Covalent radius	198±6 pm
Color lines in a spectral range Spectral lines of europium
Other properties
Natural occurrence	primordial
Crystal structure	​(bcc)
Thermal expansion	(r.t.) (poly) 35.0 µm/(m·K)
Thermal conductivity	est. 13.9 W/(m·K)
Electrical resistivity	(r.t.) (poly) 0.900 µ Ω·m
Magnetic ordering	paramagnetic[2]
Young's modulus	18.2 GPa
Shear modulus	7.9 GPa
Bulk modulus	8.3 GPa
Poisson ratio	0.152
Vickers hardness	167 MPa
CAS Number	7440-53-1
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 wo ọ̀rọ̀ àtúnṣe | references