Facts About Hafnium and Protactinium
Interesting Facts
- Hafnium metal is highly reactive, hence not found free in nature.
- Hafnium metal as predicated after Mendeleev finished his periodic table.
- Protactinium metal has 29 isotopes.
- Isotopes of Protactinium-231 used in nuclear weapon.
Sources
By-product Zirconium Refining
Found in Uranium Ores, Mining, Ores of metals
Who Discovered
Dirk Coster and George de Hevesy
William Crookes
Discovery
In 1922
In 1900
Abundance In Universe
Not Available
Abundance In Sun
~-9999 %
Abundance In Meteorites
Not Available
Abundance In Earth's Crust