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Polonium
Polonium

Chromium
Chromium



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Facts About Polonium and Chromium

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1 Facts
1.1 Interesting Facts
  • 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.
  • Chromium is highly reactive, hence it is not found free in nature.
  • Ores of Chromites mineral are the major source of Chromium metal.
  • Almost 90% leather tanning is done with the help of chromium.
1.2 Sources
Mining, Ores of metals
Found in Minerals, Mining, Ores of metals, Ores of Minerals
1.3 History
1.3.1 Who Discovered
Pierre Curie and Marie Curie
Louis Nicolas Vauquelin
1.3.2 Discovery
In 1898
In Between 1797 - 1798
1.4 Abundance
1.4.1 Abundance In Universe
NA1.5 * 10-3 %
Facts About Thallium
5E-09 0.11
1.1.2 Abundance In Sun
~-9999 %~0.002 %
Facts About Beryllium
1E-08 0.1
1.4.2 Abundance In Meteorites
NA0.30 %
Facts About Gold
1.7E-07 22
1.4.5 Abundance In Earth's Crust
NA0.01 %
Facts About Radium
9.9E-12 8.1
1.5.1 Abundance In Oceans
0.00 %0.00 %
Facts About Protactinium
2E-23 1.1
1.6.3 Abundance In Humans
NA0.00 %
Facts About Radium
1E-13 1.4