Francium (Fr) — Element 87: Properties & Data | Aladdin Scientific
Francium(Fr) — Element 87
Francium (Fr) is a alkali metal with atomic number 87 and atomic mass 223.02. It has melting point 300 K (27 °C). It sits in group 1 and period 7 of the periodic table and was discovered in 1939.
Key facts
| Atomic mass | 223.0197 u |
|---|---|
| Electron configuration | [Rn]7s1 |
| Oxidation states | +1 |
| Electronegativity (Pauling) | 0.7 |
| Atomic radius (van der Waals) | 348 pm |
| Ionization energy | 3.9 eV |
| Electron affinity | 0.47 eV |
| Melting point | 300 K |
| Standard state | Solid |
| Year discovered | 1939 |
Frequently asked questions
What is the electron configuration of francium?
The ground-state electron configuration of francium is [Rn]7s1.
What group and period is francium in?
Francium (Fr) is in group 1 and period 7 of the periodic table, classified as a alkali metal.
What is the melting point of francium?
Francium melts at 300 K (27 °C).
What is the standard state of francium?
Francium 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: .