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 .
Quick Facts Europium, Panagway ...
Europium
63
Panagway
silvery white, but rarely seen without oxide discoloration
Kinatibuk-ang mga kinaiya
Ngalan, simbolo , kaiphan
europium, Eu, 63
Paglitok
[[Help:Pronunciation respelling key|ew-Plantilya:Smallcaps all ]]
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 Electron shells of europium (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)
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
150 Eusyn 36.9 y ε 2.261
150 Sm
151 Eu47.8%
5×1018 y
α 1.9644
147 Pm
152 Eusyn 13.516 y ε
1.874
152 Sm
β− 1.819
152 Gd
153 Eu52.2%
153 Eu is stable with 90 neutrons
· r
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