Francium (Fr)
| Symbol | Fr |
| Atomic Number | 87 |
| Atomic Mass | (233) g.mol -1 |
| Discovered by | Marguerite Perey in 1939 |
Chemical Properties of Francium
| Group | 1 | Melting point | 21°C, 70°F, 294 K |
| Period | 7 | Boiling point | 650°C, 1202°F, 923 K  |
| Block | s | Density (g cm−3) | Unknown |
| Atomic number | 87 | Relative atomic mass | [223] |
| State at 20°C | Solid | Key isotopes | 223Fr |
| Electron configuration | [Rn] 7S1 | CAS number | 7440-73-5 |
| ChemSpider ID | 4886484 | ChemSpider is a free chemical database | |
Uses of Francium
Since francium is produced in tiny quantities in nature, it does show any much commercial applications.
- Francium has been used in the field of research, chemistry and also in the atomic structure.
- It is used for diagnostics for curing cancers.
- It is also used in many spectroscopic experiments.
- Francium is a highly radioactive metal, and since it exhibits a short half-life, it does not have more impact on the environment.
Properties of Francium
- Francium is the least founded metal on the planet earth and rarely found in nature. It is considered to be the second rarest metal discovered on the earth’s crust next to the Astatine.
- Francium is an element with chemical symbol Fr and atomic number 87 in the periodic table. It is produced both by naturally and by artificial methods.
- Most probably, it is assumed that about 340-550 gms of this metal francium are found in the earth’s crust.
- Francium occurs on the decay of the alpha particles, which are found in the minerals of uranium.
- This metal has about 34 isotopes that are said to be occurring in nature. Francium has the only 1-valence electron.
