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Hafnium
Hafnium

Neptunium
Neptunium



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Hafnium
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Neptunium

Facts About Hafnium and Neptunium

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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
Made by Bombarding Uranium with Neutrons, Ores of metals
1.3 History
1.3.1 Who Discovered
Dirk Coster and George de Hevesy
Edwin McMillan and Philip H. Abelson
1.3.2 Discovery
In 1922
In 1940
1.4 Abundance
1.4.1 Abundance In Universe
7 * 10-8 %NA
Facts About Thallium
5E-09 0.11
1.4.2 Abundance In Sun
~0.0000001 %~-9999 %
Facts About Beryllium
1E-08 0.1
1.4.3 Abundance In Meteorites
0.00 %NA
Facts About Gold
1.7E-07 22
1.4.4 Abundance In Earth's Crust
0.00 %NA
Facts About Radium
9.9E-12 8.1
1.4.5 Abundance In Oceans
0.00 %NA
Facts About Protactinium
2E-23 1.1
1.4.6 Abundance In Humans
NANA
Facts About Radium
1E-13 1.4