Fr
Francium
Alkali Metal
Francium is an extremely rare and highly radioactive metal. It is the second rarest naturally occurring element after astatine and has no practical applications.
Key Facts
Atomic Number
87
Atomic Weight
223
State
Solid
Half-life
22 minutes (Fr-223)
Discovered
1939
Marguerite Perey
Overview
Description
Francium is an extremely rare and highly radioactive metal. It is the second rarest naturally occurring element after astatine and has no practical applications.
Discovery
Francium was discovered in 1939 by Marguerite Perey.