Facts About Protactinium and Mercury
Interesting Facts
- Protactinium metal has 29 isotopes.
- Isotopes of Protactinium-231 used in nuclear weapon.
  
- At room temperature mercury is found in a liquid state.
- A coin of pound or rupees floats in mercury.
- Because of its low melting point and boiling point it is used in thermometers.
  
Sources
Found in Uranium Ores, Mining, Ores of metals
  
Mining, Ores of Minerals
  
History
  
  
Who Discovered
William Crookes
  
Ancient Chinese and Indians
  
Discovery
In 1900
  
Before 2000 BCE
  
Abundance
  
  
Abundance In Earth's Crust
Abundance In Oceans
Not Available