| Francium | ≡ |
| Symbol | Fr |
|---|---|
| Latin name | Francium |
| Atomic number | 87 |
| Period | 7 |
| Element category | Alkali metals |
| Relative atomic mass | 223.019 |
| Group | I.A |
| Electronegativity | 0.7 |
| Oxidation numbers | 1 |
| State | Solid |
| Melting point [°C] | 27 |
| Boiling point [°C] | 677 |
| Thermal conductivity [W m-1K-1] | 15 |
| Discovery | 1939 |
| Stable isotopes | 0 |
| Unstable isotopes | 21 |