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