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.
Experiment with the elements
Dysprosium doesn't form any compounds in our lab yet, but the periodic table sandbox lets you combine dozens of other real elements into real compounds — water, table salt, ammonia and many more — with their true chemical formulas.