← Periodic Table
63Eu151.964
Europium
LanthanideEuropium is a chemical element with symbol Eu and atomic number 63. It was isolated in 1901 and is named after the continent of Europe. It is a moderately hard, silvery metal which readily oxidizes in air and water.
Phase: Solid
2, 8, 18, 25, 8, 2
Physical Properties
Atomic Mass151.9641 u
Density5.264 g/cm³
Melting Point1099 K
Boiling Point1802 K
Molar Heat27.66 J/(mol·K)
Period6
PhaseSolid
Chemical Properties
Electron Configuration1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f7
Semantic Config[Xe] 4f7 6s2
Shells2, 8, 18, 25, 8, 2
Electron Affinity11.2 kJ/mol
Electronegativity1.2
Ionization Energies
IE1: 547.1 kJ/molIE2: 1085 kJ/molIE3: 2404 kJ/molIE4: 4120 kJ/mol
Discovery
Discovered byEugène-Anatole Demarçay