Europium

Eu Europium Rare Earth

 

Atomic number:  63 Atomic weight:  151.965
Shells:  2,8,18,25,8,2 Orbitals:  [Xe] 4f7 6s2
Melting point:  822°C Boiling point:  1527°C
Covalent radius:  1.85 Å Atomic volume:  28.9 cm³/mol
Atomic radius:  2.56 Å Ionic radius:  1.07 (+3) Å
Electronegativity:  1.2 Oxidation states:  (3),2
1st ionization pot.:  5.6704 V 2nd ionization pot.:  11.245 V
3rd ionization pot.:  24.926 V Specific heat:  0.18 J/gK
Heat of fusion:  9.210 kJ/mol Heat of vapor.:  143.50 kJ/mol
Thermal conduct.:  0.139 W/cmK Electrical conduct.:  0.0112 10^6/cm ohm
Density:  5.259 g/cm³ Valence:  2,3