Facts About Protactinium and Iridium
Interesting Facts
- Protactinium metal has 29 isotopes.
- Isotopes of Protactinium-231 used in nuclear weapon.
  
- Iridium element occurs as natural alloys of Platinum and Osmium.
- Iridium element is known as the most corrosion resistance metal .
  
Sources
Found in Uranium Ores, Mining, Ores of metals
  
Found in Minerals, Mining, Ores of Minerals
  
History
  
  
Who Discovered
William Crookes
  
Smithson Tennant
  
Discovery
In 1900
  
In 1803
  
Abundance
  
  
Abundance In Universe
Not Available
  
Abundance In Sun
~-9999 %
  
~0.0000002 %
  
25
Abundance In Meteorites
Not Available
  
Abundance In Earth's Crust
Abundance In Oceans
Not Available