Francium

Views Updated: Dec 15, 2025

Abbreviation

Pronunciation

/ˈfrænsiəm/

Francium(Fr) is the densest of the Alkali Metals and also radioactive.
Even Francium(Fr)'s most stable isotope, Francium(Fr)-223 only has a half-life of22 minutes.
Any of the monovalent metals of group I of the periodic table ( lithium or sodium or potassium or rubidium or cesium or francium ).
The half-life of francium is 22 minutes.
Because Francium(Fr) is mainly only found synthetically in laboratory research, it has no known use outside of the laboratory.

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