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Uranium

12:33

Uranium - THE MOST DANGEROUS METAL ON EARTH!

6:03

Uranium - Periodic Table of Videos

0:55

The separation of Uranium from Plutonium - Chemical elements: properties and reactions (7/8)

10:58

Incredibly rare and radioactive elements ☢

4:02

Whas is URANIUM?

Uranium is a chemical element with symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. The most common isotopes in natural uranium are uranium-238 and uranium-235. Uranium has the highest atomic weight of the primordially occurring elements. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. It occurs naturally in low concentrations of a few parts per million in soil, rock and water, and is commercially extracted from uranium-bearing minerals such as uraninite.
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  • Characteristics 

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  • Occurrence 

  • Compounds