Elements · ← Nd Neodymium · Sm Samarium →
Pm Promethium
Basic facts
| Symbol | Pm |
|---|---|
| Atomic number | 61 |
| Atomic mass | 144.91276(no standard atomic weight: the element has no stable isotopes or characteristic natural composition; PubChem lists this isotope mass) |
| Group | none (lanthanide series) |
| Period | 6 |
| Block | f-block |
| Category | Lanthanide |
| Standard state | Solid |
| Discovered | 1945 |
Source: PubChem, Promethium (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.