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Hafnium
Hafnium

Roentgenium
Roentgenium



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Hafnium
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Roentgenium

Facts About Hafnium and Roentgenium

1 Facts
1.1 Interesting Facts
  • Hafnium metal is highly reactive, hence not found free in nature.
  • Hafnium metal as predicated after Mendeleev finished his periodic table.
Not Available
1.2 Sources
By-product Zirconium Refining
Synthetically Produced
1.3 History
1.3.1 Who Discovered
Dirk Coster and George de Hevesy
Gesellschaft für Schwerionenforschung
1.3.2 Discovery
In 1922
In 1994
1.4 Abundance
1.4.1 Abundance In Universe
7 * 10-8 %NA
Facts About Thallium
5E-09 0.11
1.5.1 Abundance In Sun
~0.0000001 %~-9999 %
Facts About Beryllium
1E-08 0.1
1.6.1 Abundance In Meteorites
0.00 %NA
Facts About Gold
1.7E-07 22
1.7.2 Abundance In Earth's Crust
0.00 %NA
Facts About Radium
9.9E-12 8.1
1.7.4 Abundance In Oceans
0.00 %NA
Facts About Protactinium
2E-23 1.1
1.7.6 Abundance In Humans
NANA
Facts About Radium
1E-13 1.4