Francium

Francium (Fr)
Francium
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 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.

Practise This Question

Assertion : A future discovery of sub atomic particles led to the failure of Dalton’s atomic theory.

Reason : An atom is made up of protons, neutrons and electrons.