70 Yb 173.05
Ytterbium
Lanthanide
Ytterbium (Yb) is a chemical element with atomic number 70, classified as a lanthanide. At room temperature it is a solid. It was discovered in 1878 by Jean Charles Galissard de Marignac.
Properties
- Atomic number
- 70
- Atomic mass
- 173.05 u
- Category
- Lanthanide
- Group
- 0
- Period
- 6
- Block
- f-block
- Electron configuration
- [Xe] 4f¹⁴ 6s²
- Phase at STP
- Solid
- Density
- 6.965 g/cm³
- Melting point
- 1097 K (823.9 °C)
- Boiling point
- 1469 K (1195.8 °C)
- Electronegativity
- 1.1
- Atomic radius
- 222 pm
- Ionization energy
- 6.254 eV
- Discovery
- 1878 · Jean Charles Galissard de Marignac
Common uses
Lasers, alloys, catalysts, atomic clocks
Did you know?
Used in atomic clocks and named after Ytterby, Sweden.