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Chemicals

Uranium

Description

 

Uranium is a metallic chemical element in the actinide series of the periodic table. It is used as a colorant in uranium glass, producing orange-red to lemon yellow hues. It was also used for tinting and shading in early photography. The 1789 discovery of uranium in the mineral pitchblende is credited to Martin Heinrich Klaproth, who named the new element after the planet Uranus. Eugène-Melchior Péligot was the first person to isolate the metal and its radioactive properties were discovered in 1896 by Antoine Becquerel. Research by Enrico Fermi and others starting in 1934 led to its use as a fuel in the nuclear power industry and in Little Boy, the first nuclear weapon used in war.

Chemical Properties

Appearance Silvery Gray Metallic Solid
Atomic Number 92
Atomic Weight 238.0289 g/mol
Block f
Boiling Point 4131 °C
CAS Number 7440-61-1
Class 7
Crystal Structure Orthorhombic
Density 19.1 g/cm3
EINECS Number 231-170-6
Electron Configuration 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2 4d10 5p6 4f14 5d10 6s2 6p6 5f36d1 7s2
Ionization Energy 597.6 KJ/mol
Melting Point 1132.2 °C
Oxidation State 6,5,4,3
Period 7
Symbol U
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