Facts About Francium and Mendelevium
Interesting Facts
- 223 Francium has the longest half life at 21.8.
- Francium metal is produced by alpha decay in 227Actinium 227.
- Mendelevium metal is synthetically produced metal.
- Mendelevium metal has been produced in only trace amount.
Sources
Formed by Decay Process, Mining
Bombarding Einsteinium with Helium Ions
Who Discovered
Marguerite Perey
Lawrence Berkeley National Laboratory
Discovery
In 1939
In 1955