Properties of Uranium and Gallium
Melting Point
1,132.00 °C
  
39
Boiling Point
3,818.00 °C
  
16
2,403.00 °C
  
99+
Hardness
  
  
Brinell Hardness
2,350.00 MPa
  
2
Vickers Hardness
1,960.00 MPa
  
2
Not Available
  
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Reflectivity
Not Available
  
Not Available
  
Speed of Sound
3,155.00 m/s
  
25
2,740.00 m/s
  
31
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
U
  
Ga
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Not Available
  
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Not Available
  
Allen Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
597.60 kJ/mol
  
99+
578.80 kJ/mol
  
99+
2nd Energy Level
1,420.00 kJ/mol
  
99+
1,979.30 kJ/mol
  
13
3rd Energy Level
1,900.00 kJ/mol
  
99+
2,963.00 kJ/mol
  
28
Electrochemical Equivalent
1.48 g/amp-hr
  
99+
0.87 g/amp-hr
  
99+
Other Chemical Properties
Density
  
  
Density At Room Temperature
19.10 g/cm3
  
17
5.91 g/cm3
  
99+
Density When Liquid (at m.p.)
6.10 g/cm3
  
99+
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available
  
Vapor Pressure at 2000 K
Not Available
  
Tensile Strength
Not Available
  
Not Available
  
Viscosity
Not Available
  
Not Available
  
Elasticity properties
  
  
Shear Modulus
Not Available
  
Bulk Modulus
Not Available
  
Other Mechanical Properties
NA
  
Symbol
U
  
Ga
  
Period Number
7
  
4
  
Atomic Volume
12.59 cm3/mol
  
40
11.80 cm3/mol
  
99+
Electron Configuration
[Rn] 5f3 6d1 7s2
  
[Ar] 3d10 4s2 4p1
  
Valence Electron Potential
170.00 (-eV)
  
4
69.70 (-eV)
  
19
Atom
  
  
Crystal Lattice
ORTH-Crystal-Structure-of-Uranium.jpg#100
  
ORTH-Crystal-Structure-of-Gallium.jpg#100
  
Radius of an Atom
  
  
Lattice Angles
π/2, π/2, π/2
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Adjacent Atomic Numbers
  
  
Electrical Properties
  
  
Resistivity
270.00 nΩ·m
  
15
Electrical Conductivity
0.04 106/cm Ω
  
37
0.07 106/cm Ω
  
29
Electron Affinity
Not Available
  
28.90 kJ/mol
  
31
Magnetic Characteristics
  
  
Permeability
Not Available
  
Not Available
  
Susceptibility
Not Available
  
Not Available
  
Specific Heat
0.12 J/(kg K)
  
40
0.37 J/(kg K)
  
16
Thermal Conductivity
27.50 W/m·K
  
40
40.60 W/m·K
  
34
Critical Temperature
Not Available
  
Not Available
  
Molar Heat Capacity
27.67 J/mol·K
  
15
25.86 J/mol·K
  
35
Thermal Expansion
13.90 µm/(m·K)
  
27
18.00 µm/(m·K)
  
24
Standard Molar Entropy
50.20 J/mol.K
  
31
40.80 J/mol.K
  
38
Enthalpy
  
  
Enthalpy of Vaporization
477.00 kJ/mol
  
13
256.10 kJ/mol
  
36
Enthalpy of Fusion
15.48 kJ/mol
  
19
5.59 kJ/mol
  
99+
Enthalpy of Atomization
489.50 kJ/mol
  
14
276.10 kJ/mol
  
39