Facts About Francium and Promethium
Interesting Facts
- 223 Francium has the longest half life at 21.8.
- Francium metal is produced by alpha decay in 227Actinium 227.
- Promethium metal found in Pitchblende.
- Promethium metal is highly radioactive metal.
Sources
Formed by Decay Process, Mining
Found in Minerals, Mining
Who Discovered
Marguerite Perey
Chien Shiung Wu, Emilio Segrè, Hans Bethe
Discovery
In 1939
In 1942