Uranium Element Properties

Uranium

f91
Pa
Protactinium
f92
U
Uranium
f93
Np
Neptunium
General
Name(Uranium)
Symbol(U)
Number(92)
Group Number(NA)
Group(Rare Earth, Actinides)
Block(f)
Density(18.9 g/cm3)
Atomic Weight(238.029 g/mol)
Atomic Volume(12.59 cm3/mol)
Discover(1789)


States
State(Solid)
Melting Point(1405.3 K)
Boiling Point(4404 K)
Triple Point(Nil)
Critical Point(Nil)
Heat of Fusion(9.14 kJ/mol)
Heat of Vaporization(417.1 kJ/mol)


Energies
First Ionization Energy(584 kJ/mole)
Second Ionization Energy(Nil)
Third Ionization Energy(Nil)
Electronegativity(1.7)
Electron Affinity(Nil)
Specific Heat(0.12 J/gK)
Heat Atomization(490 kJ/mole atoms)


Oxidation and Electrons
Shells(2,8,18,32,21,9,2)
Electron Configuration([Rn] 4f3 6d1 7s2)
Minimum Oxidation Number(0)
Maximum Oxidation Number(6)
Minimum Common Oxidation Number(0)
Maximum Common Oxidation Number(6)


Appearance and Characteristics
Crystal Structure(orthorhombic)
Characteristics(Radioactive)
Color(silvery)
Uses(nuclear reactor fuel)
Hardness(Nil)
Toxicity(None)


Reactions
Reaction with Air(mild, =>U3O8)
Reaction with 6M HCl(mild, =>H2)
Reaction with 15M HNO3(passivated)
Reaction with 6M NaOH(None)


Other Forms
Number of Isotopes(3)
Hydride(UH3)
Oxide(UO UO2 U2O5 U3O8 UO3)
Chloride(UCl3 UCl4 UCl5 UCl6)


Radius
Atomic Radius(156 pm)
Ionic Radius (1+ ion)(Nil)
Ionic Radius (1- ion)(Nil)
Ionic Radius (2+ ion)(Nil)
Ionic Radius (2- ion)(Nil)
Ionic Radius (3+ ion)(116.5 pm)


Conductivity
Thermal Conductivity(27.5 J/m-sec-deg)
Electrical Conductivity(33.333 1/mohm-cm)
Polarizability(27.4 A3)


Abundance
Source(Uranite (oxide))
Relation Abundance Solar System(-2.046 log)
Abundance Earths Crust(0.4 log)


f91
Pa
Protactinium
f92
U
Uranium
f93
Np
Neptunium

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