Uranium

protactinium – uranium – neptunium Nd U Full table
General
Name, Symbol, Number	Uranium, U, 92
Chemical series	Actinides
Period, Block	7, f
Density, Hardness	19050 kg/m3, ND
Appearance	silvery-white metal Uranium
Atomic properties
Atomic weight	238.0289 amu
Atomic radius (calc.)	175 (ND) pm
Covalent radius	ND pm
van der Waals radius	186 pm
Electron configuration	[Rn]7s25f36d1
e- 's per energy level	2,8,18,32,21,9,2
Oxidation states (Oxide)	5 (weak base)
Crystal structure	Orthohombic
Physical properties
State of matter	Solid (paramagnetic)
Melting point	1405 K (2912 °F)
Boiling point	4091 K ( 6904 °F)
Molar volume	12.49 ×10-6 m3/mol
Heat of vaporization	477 kJ/mol
Heat of fusion	15.48 kJ/mol
Vapor pressure	ND Pa at 2200 K
Velocity of sound	3155 m/s at 293.15 K
Miscellaneous
Electronegativity	1.38 (Pauling scale)
Specific heat capacity	120 J/(kg·K)
Electrical conductivity	3.8 106/m ohm
Thermal conductivity	27.6 W/(m·K)
1st ionization potential	597.6 kJ/mol
2nd ionization potential	1420 kJ/mol
Most stable isotopes
iso NA half-life DM DE MeV DP 232U {syn.} 68.9 y α & SF 5.414 228Th 233U {syn.} 159,200 y SF & α 4.909 229Th 234U 0.006% 245,500 y SF & α 4.859 230Th 235U 0.72% 7.038 E8 y SF & α 4.679 231Th 236U {syn.} 2.342 E7 y SF & α 4.572 232Th 238U 99.275% 4.468 E9 y SF & α 4.270 234Th
SI units & STP are used except where noted.

Uranium adalah unsur kimia dalam tabel periodik yang memiliki simbol U dan nomor atom 92. Sebuah logam berat, beracun, berwarna putih keperakan dan radioaktif alami, uranium termasuk ke seri aktinida (actinide series) dan isotopnya ²³⁵U digunakan sebagai bahan bakar reaktor nuklir dan senjata nuklir. Uranium biasanya terdapat dalam jumlah kecil di bebatuan, tanah, air, tumbuhan, dan hewan (termasuk manusia).

See also

• Depleted uranium
• Teknik nuklir
• Putaran bahan bakar nuklir
• Fisika nuklir
• Reaktor nuklir
• Senjata nuklir

Referensi

• Los Alamos National Laboratory's Chemistry Division: Periodic Table - Uranium
• U.S. EPA: Radiation Information for Uranium (some adapted public domain text)
• World Uranium Resources, by Kenneth S. Deffeyes and Ian D. MacGregor, Scientific American, January, 1980, page 66. Argues that the supply of uranium is very large.

Pranala luar

• WebElements.com - Uranium (also used as a reference)
• EnvironmentalChemistry.com - Uranium (also used as a reference)
• It's Elemental - Uranium
• The US government provides lots of statistics and information relevant to the energy industry at
• Nuclear Power and Nuclear Weapons: Making the Connections
• The Uranium Information Centre also has lots of information on uranium