Fr
Francium
Z = 87 · Alkali Metal · 223.0 u
Nuclear Engineering Significance
All isotopes are radioactive; longest-lived is Fr-223 (t₁/₂ = 22 min). Not significant in reactor engineering.
Basic properties
- Atomic number (Z)
- 87
- Standard atomic mass
- 223.0 u
- Category
- Alkali Metal
Isotopes & cross-section data
No nuclide data for this element in the reference database.
The NRDP database focuses on nuclides relevant to reactor physics. For full isotope data, see NNDC NuDat 3.