Europium (Eu)
Europium (Eu) is element 63 of the periodic table, a lanthanide in period 6, in the f-block. Its standard atomic weight is 151.964, so one mole of europium atoms has a mass of 151.964 g. At room temperature it is a solid; it melts at 821.85 °C and boils at 1528.85 °C.
| Atomic number | 63 |
|---|---|
| Symbol | Eu |
| Standard atomic weight | 151.964 |
| Molar mass | 151.964 g/mol |
| Category | Lanthanide |
| Group | f-block (lanthanide series) |
| Period | 6 |
| Block | f-block |
| Electron configuration | [Xe] 6s2 4f7 |
| Oxidation states | +3, +2 |
| Electronegativity (Pauling) | — |
| Atomic radius (van der Waals) | 233 pm |
| First ionisation energy | 5.67 eV (547.1 kJ/mol) |
| Electron affinity | — |
| State at room temperature | Solid |
| Melting point | 1095 K (821.85 °C) |
| Boiling point | 1802 K (1528.85 °C) |
| Density | 5.24 g/cm³ |
| Discovered | 1901 |
Lanthanides
La · LanthanumCe · CeriumPr · PraseodymiumNd · NeodymiumPm · PromethiumSm · SamariumGd · GadoliniumTb · TerbiumDy · DysprosiumHo · HolmiumEr · ErbiumTm · ThuliumYb · Ytterbium
Calculate with Europium
Atomic weight: IUPAC CIAAW standard atomic weight. Other properties: PubChem (U.S. National Library of Medicine, public domain). Values such as melting point and radius depend on how they were measured; check a data book for precise work.