Erbium (Er) — Element 68: Properties & Data | Aladdin Scientific
Erbium(Er) — Element 68
Erbium (Er) is a lanthanide with atomic number 68 and atomic mass 167.26. It has melting point 1802 K (1529 °C), boiling point 3141 K (2868 °C), density 9.07 g/cm³. It sits in period 6 of the periodic table and was discovered in 1843.
Key facts
| Atomic mass | 167.2600 u |
|---|---|
| Electron configuration | [Xe]6s2 4f12 |
| Oxidation states | +3 |
| Electronegativity (Pauling) | 1.24 |
| Atomic radius (van der Waals) | 235 pm |
| Ionization energy | 6.108 eV |
| Melting point | 1802 K |
| Boiling point | 3141 K |
| Density | 9.07 g/cm³ |
| Standard state | Solid |
| Year discovered | 1843 |
Frequently asked questions
What is the electron configuration of erbium?
The ground-state electron configuration of erbium is [Xe]6s2 4f12.
What group and period is erbium in?
Erbium (Er) is in period 6 (lanthanide series) of the periodic table, classified as a lanthanide.
What is the melting point of erbium?
Erbium melts at 1802 K (1529 °C).
What is the standard state of erbium?
Erbium 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: .