66 Dy 162.5
Dysprosium
Lanthanide
Dysprosium (Dy) is a chemical element with atomic number 66, classified as a lanthanide. At room temperature it is a solid. It was discovered in 1886 by Lecoq de Boisbaudran.
Properties
- Atomic number
- 66
- Atomic mass
- 162.5 u
- Category
- Lanthanide
- Group
- 0
- Period
- 6
- Block
- f-block
- Electron configuration
- [Xe] 4f¹⁰ 6s²
- Phase at STP
- Solid
- Density
- 8.55 g/cm³
- Melting point
- 1680 K (1406.8 °C)
- Boiling point
- 2840 K (2566.8 °C)
- Electronegativity
- 1.22
- Atomic radius
- 228 pm
- Ionization energy
- 5.939 eV
- Discovery
- 1886 · Lecoq de Boisbaudran
Common uses
Magnets, lasers, nuclear reactors, data storage
Did you know?
Critical for wind turbines and electric vehicle motors.