65 Tb
Lanthanide
Terbium
Used in green phosphors.
Properties of Terbium
- Atomic number (Z)
- 65
- Symbol
- Tb
- Atomic mass
- 158.93 g/mol
- Category
- Lanthanide
- Group
- 3
- Period
- 6
- Electron configuration
- [Xe] 4f⁹ 6s²
- Electronegativity (Pauling)
- 1.2
- Atomic radius
- 225 pm
- First ionization energy
- 565 kJ/mol
- Melting point
- 1629 K (1355.8 °C)
- Boiling point
- 3503 K (3229.8 °C)
- Density
- 8.229 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1843