Europyo

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.

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
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