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Hafnium
Hafnium

Polonium
Polonium



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Facts About Hafnium and Polonium

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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.
  • Polonium was the first radioactive element to be discovered.
  • Polonium element and its compounds are highly radioactive.
  • Its alloy with Beryllium provides source of neutrons.
1.3 Sources
By-product Zirconium Refining
Mining, Ores of metals
1.4 History
1.4.1 Who Discovered
Dirk Coster and George de Hevesy
Pierre Curie and Marie Curie
1.4.2 Discovery
In 1922
In 1898
1.5 Abundance
1.5.1 Abundance In Universe
7 * 10-8 %NA
Facts About Thallium
5E-09 0.11
1.1.2 Abundance In Sun
~0.0000001 %~-9999 %
Facts About Beryllium
1E-08 0.1
1.1.3 Abundance In Meteorites
0.00 %NA
Facts About Gold
1.7E-07 22
1.8.3 Abundance In Earth's Crust
0.00 %NA
Facts About Radium
9.9E-12 8.1
1.11.4 Abundance In Oceans
0.00 %0.00 %
Facts About Protactinium
2E-23 1.1
1.11.5 Abundance In Humans
NANA
Facts About Radium
1E-13 1.4