63Eu151.96
Europium (Eu)
Element 63 · Lanthanide
Europium (Eu) is a chemical element with atomic number 63. It is classified as a lanthanide in period 6 of the periodic table (the f-block). Its standard atomic weight is 151.96 u and its ground-state electron configuration is [Xe] 4f⁷ 6s².
Europium facts
| Atomic number (Z) | 63 |
|---|---|
| Symbol | Eu |
| Standard atomic weight | 151.96 u |
| Category | Lanthanide |
| Group | — (f-block) |
| Period | 6 |
| Block | f-block |
| Electron configuration | [Xe] 4f⁷ 6s² |
| Electronegativity (Pauling) | 1.2 |
| State at 20 °C | Solid |
| Protons / electrons | 63 / 63 |
| Neutrons (most common isotope, approx.) | 89 |
| Molar mass | 151.96 g/mol |