Home 92 U Uranium back to the periodic table
 
Atomic number   92
Symbol   U
Atomic weight   238.0289
Density [g/cm3]   18.97
Melting point [°C]   1132.3
Boiling point [°C]   3820
1st Ionization energy [eV]   6.08
Electronic configuration   [Rn] 5f3 6d 7s2
Oxidation number (most stable)   6, 5, 4, 3
Atomic radius [pm]   138.5 (a)
Ionic radius [pm]   73 (6+)
Abundance in crustal rocks [ppm]   2.3
Origin of the name   named after the planet Planeten Uranus, which was discovered in 1781
Discovery   1789 by the German chemists Klaproth
Uses   uranium is used as nuclear fuel, enriched with U-235.
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 © 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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