Facts About Protactinium and Thulium
Interesting Facts
- Protactinium metal has 29 isotopes.
- Isotopes of Protactinium-231 used in nuclear weapon.
  
- Thulium metal can resist corrosion due to dry air .
- Only Tm-169 isotope of Thulium metal occur naturally.
  
Sources
Found in Uranium Ores, Mining, Ores of metals
  
Found in Minerals, Mining, Ores of Minerals
  
History
  
  
Who Discovered
William Crookes
  
Per Teodor Cleve
  
Discovery
In 1900
  
In 1879
  
Abundance
  
  
Abundance In Universe
Not Available
  
Abundance In Sun
~-9999 %
  
~0.00000002 %
  
28
Abundance In Meteorites
Not Available
  
Abundance In Earth's Crust