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