92
U
Uranium
238.028913
Basic Information
Bohr Model
Descriptive Numbers
Mass
Periodic Position
Classification
Abundance
Color
Atomic Radius
Temperature
Density
Heat
Speed of Sound
Electrical Resistance
Magnetic Properties
Elasticity
Hardness
Etymology
Discovery & Isolation
Production & Use
Radioactivity
Electron Affinity
Dipole Polarity
Lattice
Electron & Quantum
List of Compounds
Basic Information
Bohr Model
Static
Interactive
Descriptive Numbers
CAS Number
7440-61-1
CID Number
CID23989
DOT Number
2979
RTECS Number
RTECSYR3490000
Mendeleev Number
20
Pettifor Number
45
Eu Number
Joa 1-170-6
Space Group Number
63
Glawe Number
36
Mass
Atomic Mass
238.028913 Da
Uncertainty
0.00003
Periodic Position
X Position
7
Y Position
9
Period
7
Group
N/A
Classification
Block
f
Category
Actinides
Geochemical
Rare Earth and Similars
Goldschmidt
Lithophilic
Electrical Type
Conductive
Abundance
Seawater
3.2e-9 kg/L
Earth Crust
0.0000027 g
Human Body
1e-7 %
Solar System
1.8e-8 mole ratio to silicon
Meteorites
0.000001 %
Color
Jmol
#008FFF
Molcas Gv
#008FFF
CPK
#FF1493
Atomic Radius
Empirical
175
Van Der Waals
186
Batsanov
230
Rahm
283
Uff
339.5
Mm3
252
Alvarez
271
Covalent (Triple Bound)
118
Covalent (Cordero)
196
Covalent (Pyykko)
170
Covalent (Pyykko Double)
134
Covalent (Pyykko Triple)
118
Metallic
156
Temperature
Melting/Freeze (USE)
1405.3 °K
Melting/Freeze (WEL)
1405.3 °K
Melting/Freeze (CRC)
1408 °K
Melting/Freeze (LNG)
1408 °K
Boiling/Density (USE)
4404 °K
Boiling/Density (WEL)
4200 °K
Boiling/Density (CRC)
4404 °K
Boiling/Density (LNG)
4404 °K
Superconducting Point
0.68 °K
Density
STP
19.1 kg/cm³
Solid (WEL)
19050 kg/cm³
Solid (CRC)
19100 kg/cm³
Solid (LNG)
19100 kg/cm³
Liquid (CR2)
17300 kg/cm³
Heat
Molar Volume
12.49 cm³/mol
Atomic Volume
12.5 cm³
Heat Of Fusion USE
12.6 kJ/mol
Heat Of Fusion CRC
9.14 kJ/mol
Heat Of Fusion LNG
9.14 kJ/mol
Heat Of Fusion WEL
14 kJ/mol
Evaporation USE
417 kJ/mol
Evaporation LNG
514 kJ/mol
Evaporation WEL
530 kJ/mol
Molar Heat
27.665 J/molK
Heat Capacity USE
0.115 J/gK
Heat Capacity CRC
27.665 J/gK
Heat Capacity LNG
27.66 J/gK
Heat Capacity WEL
27.7 J/gK
Thermal Conductivity
27.5 W/m*K
Thermal Expansion
0.0000139 1/K
Adiabatic Index
N/A
Speed of Sound
Extensional
3155 m/s
Electrical Resistance
273k
280 nΩm
Magnetic Properties
Order
paramanyetic
Susceptibility
2.2e-8 m3/kg
Elasticity
Shear Modulus
111 GPa
Bulk Modulus
100 GPa
Poisson Ratio
0.23 ν
Youngs Modulus
208 GPa
Hardness
Mohs
6
Brinell
2350–3850
Vickers
1960–2500
Etymology
Description
It is a white radioactive metal element found among the actinides. It has three natural isotopes: U-238, U-235 and U-234. Uranium-235 is used as fuel for nuclear weapons and reactors. It was discovered by Martin H. Klaproth in 1789.
Language Of Origin
Greek via Latin
Origin Of Word
The seventh planet in the solar system, from Uranus
Meaning
sky
Symbol Origin
astrological, mythological
Etymological Description
It was named after the planet Uranus, which was discovered eight years earlier in 1781. The planet is named after Uranus, the god of the sky and heaven in Greek mythology.
Discovery & Isolation
Observed/Predicted By
H. Klaproth
Observed/Discovery Year
1789
Discovery Location
Isolated Sample By
E.-M. Péligot
Isolated Sample Year
1841
Production & Use
Sources
It is seen in many rocks. However, large amounts are only found in minerals such as uraninite and carnotite.
Uses
It has been used as a pigment for glass for hundreds of years. Today, it is used as fuel in nuclear reactors and bombs.
Radioactivity
Half Life
4.471×10^9 years
Lifetime
6.4498×10^9 years
Decay Mode
Alpha Six
Neutron Mass Absorption
0.0005
Neutron Cross Section
7.57
Electron Affinity
Proton Affinity
995.2
Electron Affinity (kJ/mol)
50.94
Electron Affinity (pauling)
1.38
Electron Affinity (ghosh)
0.13207
Dipole Polarity
Accepted
129
Uncertainty
17
Lattice
Constant Internal Default Radius
2.85
Strucutre
ORC
Angles
p/2, p/2, p/2
Electron & Quantum
Oxidation States
1,2,3,4,5,6
Electron Configuration
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f3 6d1
Quantum Number
mix
Electron Configuration Semantic
[Rn] 5f3 6d1 7s2
Shells-0
2
Shells-1
8
Shells-2
18
Shells-3
32
Shells-4
21
Shells-5
9
Shells-6
2
Ionization Energies-0
597.6
Ionization Energies-1
1420
List of Compounds
1-10 of 43 compounds
| Formula | Names |
|---|---|
| U | uranium uranium metal |
| B2U | uranium boride uranium boride (1:2) |
| Br3U | uranium tribromide uranium(III) bromide |
| Br4U | uranium tetrabromide uranium bromide uranium(IV) bromide |
| Br5U | uranium pentabromide uranium(V) bromide |
| Cl3U | uranium(III) chloride uranium chlorideuranium trichloride |
| Cl4U | uranium(IV) chloride tetrachlorouranium uranium chlorideuranium tetrachloride |
| F3U | uranium(III) fluoride uranium fluoride (1:3) uranium trifluoride |
| F4U | uranium tetrafluorideuranium fluoride uranium fluoride (1:4) uranium fluoride (1:4),(T-4)- uranium(IV) fluoride |
| UF5 | uranium pentafluorideuranium fluoride uranium(V) fluoride |
