Terbium (Tb) — Element 65: Properties & Data | Aladdin Scientific
Terbium(Tb) — Element 65
Terbium (Tb) is a lanthanide with atomic number 65 and atomic mass 158.925. It has melting point 1629 K (1356 °C), boiling point 3503 K (3230 °C), density 8.23 g/cm³. It sits in period 6 of the periodic table and was discovered in 1843.
Key facts
| Atomic mass | 158.9254 u |
|---|---|
| Electron configuration | [Xe]6s2 4f9 |
| Oxidation states | +3 |
| Atomic radius (van der Waals) | 221 pm |
| Ionization energy | 5.864 eV |
| Melting point | 1629 K |
| Boiling point | 3503 K |
| Density | 8.23 g/cm³ |
| Standard state | Solid |
| Year discovered | 1843 |
Frequently asked questions
What is the electron configuration of terbium?
The ground-state electron configuration of terbium is [Xe]6s2 4f9.
What group and period is terbium in?
Terbium (Tb) is in period 6 (lanthanide series) of the periodic table, classified as a lanthanide.
What is the melting point of terbium?
Terbium melts at 1629 K (1356 °C).
What is the standard state of terbium?
Terbium is a solid at standard temperature and pressure.
Related elements
About this data: property values compiled from IUPAC Standard Atomic Weights (2021), the NIST Atomic Spectra Database, and PubChem. Curated by the Aladdin Scientific technical team. Last reviewed: .