Europium Facts - Element Atomic Number 63

Europium Facts - Element Atomic Number 63 Europium is a hard, silver-colored metal that readily oxidizes in air. It is element atomic number 63, with the symbol Eu. EuropiumBasic Facts Atomic Number: 63 Symbol: Eu Atomic Weight: 151.9655 Discovery: Boisbaudran 1890; Eugene-Antole Demarcay 1901 (France) Electron Configuration: [Xe] 4f7 6s2 Element Classification: Rare Earth (Lanthanide) Word Origin: Named for the continent of Europe. Europium Physical Data Density (g/cc): 5.243 Melting Point (K): 1095 Boiling Point (K): 1870 Appearance: soft, silvery-white metal Atomic Radius (pm): 199 Atomic Volume (cc/mol): 28.9 Covalent Radius (pm): 185 Ionic Radius: 95 (3e) 109 (2e) Specific Heat (20Â °C J/g mol): 0.176 Evaporation Heat (kJ/mol): 176 Pauling Negativity Number: 0.0 First Ionizing Energy (kJ/mol): 546.9 Oxidation States: 3, 2 Lattice Structure: Body-Centered Cubic Lattice Constant (Ã…): 4.610 References: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001), Langes Handbook of Chemistry (1952), CRC Handbook of Chemistry Physics (18th Ed.) Chemistry Facts Return to the Periodic Table