70Yb173.05
Ytterbium (Yb)
Element 70 · Lanthanide
Ytterbium (Yb) is a chemical element with atomic number 70. It is classified as a lanthanide in period 6 of the periodic table (the f-block). Its standard atomic weight is 173.05 u and its ground-state electron configuration is [Xe] 4f¹⁴ 6s².
Ytterbium facts
| Atomic number (Z) | 70 |
|---|---|
| Symbol | Yb |
| Standard atomic weight | 173.05 u |
| Category | Lanthanide |
| Group | — (f-block) |
| Period | 6 |
| Block | f-block |
| Electron configuration | [Xe] 4f¹⁴ 6s² |
| Electronegativity (Pauling) | 1.1 |
| State at 20 °C | Solid |
| Protons / electrons | 70 / 70 |
| Neutrons (most common isotope, approx.) | 103 |
| Molar mass | 173.05 g/mol |