66Dy162.50
Dysprosium (Dy)
Element 66 · Lanthanide
Dysprosium (Dy) is a chemical element with atomic number 66. It is classified as a lanthanide in period 6 of the periodic table (the f-block). Its standard atomic weight is 162.50 u and its ground-state electron configuration is [Xe] 4f¹⁰ 6s².
Dysprosium facts
| Atomic number (Z) | 66 |
|---|---|
| Symbol | Dy |
| Standard atomic weight | 162.50 u |
| Category | Lanthanide |
| Group | — (f-block) |
| Period | 6 |
| Block | f-block |
| Electron configuration | [Xe] 4f¹⁰ 6s² |
| Electronegativity (Pauling) | 1.22 |
| State at 20 °C | Solid |
| Protons / electrons | 66 / 66 |
| Neutrons (most common isotope, approx.) | 96 |
| Molar mass | 162.5 g/mol |