Facts About Protactinium and Neptunium
Interesting Facts
- Protactinium metal has 29 isotopes.
- Isotopes of Protactinium-231 used in nuclear weapon.
  
Not Available
  
Sources
Found in Uranium Ores, Mining, Ores of metals
  
Made by Bombarding Uranium with Neutrons, Ores of metals
  
History
  
  
Who Discovered
William Crookes
  
Edwin McMillan and Philip H. Abelson
  
Discovery
In 1900
  
In 1940
  
Abundance
  
  
Abundance In Earth's Crust
Not Available
  
Abundance In Oceans
Not Available