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
Frequently asked questions
What is Terbium?
Terbium (Tb) is a lanthanide, element number 65 on the periodic table. Used in green phosphors.
What is the atomic number and atomic mass of Terbium?
Terbium has atomic number 65 and an atomic mass of about 158.93 g/mol.
What is the electron configuration of Terbium?
The electron configuration of Terbium is [Xe] 4f⁹ 6s².
Where is Terbium on the periodic table?
Terbium sits in group 3, period 6, and is classified as a lanthanide.