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Ytterbium (Yb)
Atomic number 70 · Lanthanide
| Atomic number | 70 |
|---|---|
| Atomic mass | 173.045 u |
| Molar mass | 173.045 g/mol |
| Category | Lanthanide |
| Group / period / block | — / 6 / f |
| Electron configuration | [Xe] 4f14 6s2 |
| Electrons per shell | 2, 8, 18, 32, 8, 2 |
| Atomic radius | 175.0 pm |
| Density | 6.9 g/cm³ |
| First ionisation energy | 6.2542 eV |
| Melting point | 1097.15 K (824.00 °C) |
| Boiling point | 1469.15 K (1196.00 °C) |
| Common oxidation states | +3 |
| Abundance in Earth's crust | 3.2 ppm |
Uses
Atomic clocks, lasers
Discovery
1878, Jean de Marignac