Electronic data		Thermal data		Steric data
Shells: 2,8,18,32,21,9,2 Orbitals: [Rn] 5f3 6d1 7s2 Electronegativity: 1.2, -- 1. Ionization potential: 6.1941 eV 2. Ionization potential: -- eV 3. Ionization potential: -- eV Oxidation states: 6,5,4,3 Electrical conductivity: 0.0380 10^6		Melting point: 1132 °C Boiling point: 3818 °C Specific heat: 0.12 J/gK Heat of fusion: 8.520 kJ/mol Heat of vaporization: 477.0 kJ/mol Thermal conductivity: 0.276 W/cmK		Atomic radius: -- Å Ionic radius: 0.81 Å () Covalent radius: 1.42 Å Atomic volume: 12.59 cm³/mol Density (293 K): 18.9 g/cm³ Crystal structure: Orthorhombic

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Nuclide	Abundance [%]	Mass	Spin	Halflife	Decay mode	Decay tree
230U	0	230	0	20.8d		View
231U	0	231	5/2	4.20d	EC	View
232U	0	232.037	0	70y	,SF	View
233U	0	233.04	5/2	1.59E05y	,SF	View
234U	0.0055	234.041	0	2.47E05y	,SF	View
235U	0.72	235.044	7/2	7.04E08y	,SF	View
236U	0	236.046	0	2.34E07y	,SF	View
237U	0	237	1/2	6.75d	-	View
238U	99.27	238.051	0	4.47E09y	,SF	View
239U	0	239	5/2	23.5m	-	View
240U	0	240	0	14.1h	-	View

Legend

Name origin:	Named for the planet Uranus.
Description:	Silvery-white, dense, ductile, malleable, radioactive metal.
Discovered by:	Martin Klaproth
Year:	1789
Place:	Germany
Sources:	Occurs in many rocks, but in large amounts only in such minerals as pitchblende and carnotite.
Use(s):	For many centuries it was used as a pigment for glass. Now it is used as a fuel in nuclear reactors and in bombs.