Elements · ← Rn Radon · Ra Radium →
Fr Francium
Basic facts
| Symbol | Fr |
|---|---|
| Atomic number | 87 |
| Atomic mass | 223.01973(no standard atomic weight: the element has no stable isotopes or characteristic natural composition; PubChem lists this isotope mass) |
| Group | 1 |
| Period | 7 |
| Block | s-block |
| Category | Alkali metal |
| Standard state | Solid |
| Discovered | 1939 |
Source: PubChem, Francium (periodic table data, retrieved 2026-10-19). Group and period follow the standard 18-column periodic table.
Biotech uses & experiments
No verified biotech applications listed yet.