Science, Tech, Math › Science Europium Facts - Element Atomic Number 63 Chemical and Physical Properties of Eu Print Alchemist-hp, Creative Commons License Science Chemistry Periodic Table Basics Chemical Laws Molecules Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Anne Marie Helmenstine, Ph.D. Anne Marie Helmenstine, Ph.D. Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. Learn about our Editorial Process Updated on March 09, 2017 Europium is a hard, silver-colored metal that readily oxidizes in air. It is element atomic number 63, with the symbol Eu. Europium Basic 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 (@20°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 (Å): 4.610 References: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001), Lange's Handbook of Chemistry (1952), CRC Handbook of Chemistry & Physics (18th Ed.) Chemistry Facts Return to the Periodic Table Cite this Article Format mla apa chicago Your Citation Helmenstine, Anne Marie, Ph.D. "Europium Facts - Element Atomic Number 63." ThoughtCo, Aug. 27, 2020, thoughtco.com/europium-facts-element-606532. Helmenstine, Anne Marie, Ph.D. (2020, August 27). Europium Facts - Element Atomic Number 63. Retrieved from https://www.thoughtco.com/europium-facts-element-606532 Helmenstine, Anne Marie, Ph.D. "Europium Facts - Element Atomic Number 63." ThoughtCo. https://www.thoughtco.com/europium-facts-element-606532 (accessed March 28, 2024). copy citation