1 Facts
1.1 Interesting Facts
- Promethium metal found in Pitchblende.
- Promethium metal is highly radioactive metal.
- Hafnium metal is highly reactive, hence not found free in nature.
- Hafnium metal as predicated after Mendeleev finished his periodic table.
1.2 Sources
Found in Minerals, Mining
By-product Zirconium Refining
1.3 History
1.3.1 Who Discovered
Chien Shiung Wu, Emilio Segrè, Hans Bethe
Dirk Coster and George de Hevesy
1.3.2 Discovery
1.4 Abundance
1.4.1 Abundance In Universe
1.4.2 Abundance In Sun
~-9999 %~0.0000001 %
1E-08
0.1
1.4.3 Abundance In Meteorites
1.4.4 Abundance In Earth's Crust
1.4.5 Abundance In Oceans
1.4.6 Abundance In Humans