Facts About Protactinium and Francium
Interesting Facts
- Protactinium metal has 29 isotopes.
- Isotopes of Protactinium-231 used in nuclear weapon.
- 223 Francium has the longest half life at 21.8.
- Francium metal is produced by alpha decay in 227Actinium 227.
Sources
Found in Uranium Ores, Mining, Ores of metals
Formed by Decay Process, Mining
Who Discovered
William Crookes
Marguerite Perey
Discovery
In 1900
In 1939
Abundance In Earth's Crust
Not Available
Abundance In Oceans
Not Available