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Europium (Eu)
Atomic number 63 · Lanthanide
| Atomic number | 63 |
|---|---|
| Atomic mass | 151.964 u |
| Molar mass | 151.964 g/mol |
| Category | Lanthanide |
| Group / period / block | — / 6 / f |
| Electron configuration | [Xe] 4f7 6s2 |
| Electrons per shell | 2, 8, 18, 25, 8, 2 |
| Atomic radius | 185.0 pm |
| Density | 5.24 g/cm³ |
| First ionisation energy | 5.6704 eV |
| Melting point | 1095.15 K (822.00 °C) |
| Boiling point | 1802.15 K (1529.00 °C) |
| Common oxidation states | +2, +3 |
| Abundance in Earth's crust | 2 ppm |
Uses
Red phosphors in screens, banknote security
Discovery
1901, Eugène Demarçay