Facts About Protactinium and Silver
Interesting Facts
- Protactinium metal has 29 isotopes.
- Isotopes of Protactinium-231 used in nuclear weapon.
  
- It is the most reflective element.
- Silver is the second most ductile metal after Gold.
- It is also used in Dentistry as a dental alloys for clips and crowning.
  
Sources
Found in Uranium Ores, Mining, Ores of metals
  
Earth's crust, Found in Minerals, Ores of metals
  
History
  
  
Who Discovered
William Crookes
  
Unknown
  
Discovery
In 1900
  
Before 5000 BC
  
Abundance
  
  
Abundance In Universe
Not Available
  
Abundance In Sun
~-9999 %
  
~0.0000001 %
  
26
Abundance In Meteorites
Not Available
  
Abundance In Earth's Crust