Francium (Fr)
| Symbol | Fr |
| Atomic Number | 87 |
| Atomic Mass | (233) g.mol -1 |
| Discovered by | Marguerite Perey in 1939 |
| 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 | |
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.
- Francium is a 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 as well as 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.
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