Europyo

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Europium
63Eu
- ↑ Eu ↓ Am Periodic table samarium ← europium → gadolinium
Panagway
silvery white, but rarely seen without oxide discoloration
Kinatibuk-ang mga kinaiya
Ngalan, simbolo, kaiphan	europium, Eu, 63
Paglitok	/jʊˈroʊpiəm/ [[Help:Pronunciation respelling key|ew-Plantilya:Smallcaps all-pee-əm]]
Kategoriyang elemento	puthaw nga lantanido
Group, period, block	[[group {{{group}}} element|{{{group}}}]], 6, f
Gibug-aton sa atomo	151.964
Kontorno sa elektron	[Xe] 4f7 6s2 2, 8, 18, 25, 8, 2
History
Pagkadiskobre	Eugène-Anatole Demarçay (1896)
First isolation	Eugène-Anatole Demarçay (1901)
Physical properties
Phase	magahi
Density (near r.t.)	5.264 g·cm−3
Liquid density at m.p.	5.13 g·cm−3
Melting point	1099 K, 826 °C, 1519 °F
Boiling point	1802 K, 1529 °C, 2784 °F
Heat of fusion	9.21 kJ·mol−1
Heat of vaporization	176 kJ·mol−1
Molar heat capacity	27.66 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 863 957 1072 1234 1452 1796
Atomic properties
Oxidation states	3, 2, 1 (mildly basic oxide)
Electronegativity	? 1.2 (Pauling scale)
Ionization energies	1st: 547.1 kJ·mol−1
	2nd: 1085 kJ·mol−1
	3rd: 2404 kJ·mol−1
Atomic radius	180 pm
Covalent radius	198±6 pm
Miscellanea
Crystal structure	body-centered cubic
Magnetic ordering	paramagnetic[1]
Electrical resistivity	(r.t.) (poly) 0.900 µΩ·m
Thermal conductivity	est. 13.9 W·m−1·K−1
Thermal expansion	(r.t.) (poly) 35.0 µm/(m·K)
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 registry number	7440-53-1
Most stable isotopes
Main article: Isotopes of europium
iso NA half-life DM DE (MeV) DP 150Eu syn 36.9 y ε 2.261 150Sm 151Eu 47.8% 5×1018 y α 1.9644 147Pm 152Eu syn 13.516 y ε 1.874 152Sm β− 1.819 152Gd 153Eu 52.2% 153Eu is stable with 90 neutrons
v t e · r

Ang europyo (Iningles europium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Eu ug kaiphan nga atomik 63. Ang europyo mao ang puthaw nga lantanido.

1. ↑ Magnetic susceptibility of the elements and inorganic compounds, in Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.