Properties of Aluminium and Thorium
Melting Point
1,750.00 °C
  
17
Boiling Point
2,467.00 °C
  
99+
Hardness
  
  
Brinell Hardness
160.00 MPa
  
99+
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Reflectivity
Not Available
  
Speed of Sound
5,000.00 m/s
  
10
2,490.00 m/s
  
36
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Al
  
Th
  
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
577.50 kJ/mol
  
99+
587.00 kJ/mol
  
99+
2nd Energy Level
1,816.70 kJ/mol
  
19
1,110.00 kJ/mol
  
99+
3rd Energy Level
2,744.80 kJ/mol
  
38
1,978.00 kJ/mol
  
99+
Electrochemical Equivalent
0.34 g/amp-hr
  
99+
2.16 g/amp-hr
  
24
Other Chemical Properties
Density
  
  
Density At Room Temperature
2.70 g/cm3
  
99+
11.72 g/cm3
  
32
Density When Liquid (at m.p.)
2.38 g/cm3
  
99+
Not Available
  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available
  
Vapor Pressure at 2000 K
Not Available
  
Tensile Strength
Not Available
  
Viscosity
Not Available
  
Not Available
  
Elasticity properties
  
  
Other Mechanical Properties
Symbol
Al
  
Th
  
Period Number
3
  
7
  
Atomic Volume
10.00 cm3/mol
  
99+
19.90 cm3/mol
  
20
Electron Configuration
[Ne] 3s2 3p1
  
[Rn] 6d2 7s2
  
Valence Electron Potential
80.70 (-eV)
  
17
59.30 (-eV)
  
23
Atom
  
  
Crystal Lattice
FCC-Crystal-Structure-of-Aluminium.jpg#100
  
FCC-Crystal-Structure-of-Thorium.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
28.20 nΩ·m
  
99+
157.00 nΩ·m
  
22
Electrical Conductivity
0.38 106/cm Ω
  
4
0.07 106/cm Ω
  
31
Electron Affinity
42.50 kJ/mol
  
26
Not Available
  
Magnetic Characteristics
  
  
Permeability
Not Available
  
Susceptibility
Not Available
  
Specific Heat
0.90 J/(kg K)
  
5
0.12 J/(kg K)
  
40
Thermal Conductivity
237.00 W/m·K
  
4
54.00 W/m·K
  
28
Critical Temperature
Not Available
  
Not Available
  
Molar Heat Capacity
24.20 J/mol·K
  
99+
26.23 J/mol·K
  
30
Thermal Expansion
23.10 µm/(m·K)
  
17
11.00 µm/(m·K)
  
36
Standard Molar Entropy
28.30 J/mol.K
  
99+
27.30 J/mol.K
  
99+
Enthalpy
  
  
Enthalpy of Vaporization
293.70 kJ/mol
  
31
429.00 kJ/mol
  
15
Enthalpy of Fusion
10.67 kJ/mol
  
35
15.48 kJ/mol
  
19
Enthalpy of Atomization
322.20 kJ/mol
  
31
468.60 kJ/mol
  
15