Fermium (Fm) — Element 100: Properties & Data | Aladdin Scientific
Fermium(Fm) — Element 100
Fermium (Fm) is a actinide with atomic number 100 and atomic mass 257.095. It has melting point 1800 K (1527 °C). It sits in period 7 of the periodic table and was discovered in 1952.
Key facts
| Atomic mass | 257.0951 u |
|---|---|
| Electron configuration | [Rn] 5f12 7s2 |
| Oxidation states | +3 |
| Electronegativity (Pauling) | 1.3 |
| Ionization energy | 6.5 eV |
| Melting point | 1800 K |
| Standard state | Solid |
| Year discovered | 1952 |
Frequently asked questions
What is the electron configuration of fermium?
The ground-state electron configuration of fermium is [Rn] 5f12 7s2.
What group and period is fermium in?
Fermium (Fm) is in period 7 (actinide series) of the periodic table, classified as a actinide.
What is the melting point of fermium?
Fermium melts at 1800 K (1527 °C).
What is the standard state of fermium?
Fermium 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: .