Facts About Protactinium and Niobium
Interesting Facts
- Protactinium metal has 29 isotopes.
- Isotopes of Protactinium-231 used in nuclear weapon.
  
- Niobium metal was used to get called Columbium in past.
- Niobium metal found freely in nature (abundance).
  
Sources
Found in Uranium Ores, Mining, Ores of metals
  
By-product of Tin Extraction, Found in Minerals, Mining, Ores of Minerals
  
History
  
  
Who Discovered
William Crookes
  
Charles Hatchett
  
Discovery
In 1900
  
In 1801
  
Abundance
  
  
Abundance In Universe
Not Available
  
Abundance In Sun
~-9999 %
  
~0.0000004 %
  
23
Abundance In Meteorites
Not Available
  
Abundance In Earth's Crust