Properties of Lithium and Magnesium
Boiling Point
1,347.00 °C
  
99+
1,107.00 °C
  
99+
Hardness
  
  
Vickers Hardness
Not Available
  
Not Available
  
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Reflectivity
Not Available
  
Speed of Sound
6,000.00 m/s
  
3
4,940.00 m/s
  
11
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Li
  
Mg
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
520.20 kJ/mol
  
99+
737.70 kJ/mol
  
24
2nd Energy Level
7,298.10 kJ/mol
  
3
1,450.70 kJ/mol
  
99+
3rd Energy Level
11,815.00 kJ/mol
  
4
7,732.70 kJ/mol
  
5
Electrochemical Equivalent
0.26 g/amp-hr
  
99+
0.45 g/amp-hr
  
99+
Other Chemical Properties
Density
  
  
Density At Room Temperature
0.53 g/cm3
  
99+
1.74 g/cm3
  
99+
Density When Liquid (at m.p.)
0.51 g/cm3
  
99+
1.58 g/cm3
  
99+
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available
  
Vapor Pressure at 2000 K
Not Available
  
Not Available
  
Tensile Strength
Not Available
  
Not Available
  
Viscosity
Not Available
  
Not Available
  
Elasticity properties
  
  
Poisson Ratio
Not Available
  
Other Mechanical Properties
NA
  
NA
  
Symbol
Li
  
Mg
  
Period Number
2
  
3
  
Atomic Volume
13.10 cm3/mol
  
39
13.97 cm3/mol
  
37
Electron Configuration
[He] 2s1
  
[Ne] 3s2
  
Valence Electron Potential
19.00 (-eV)
  
99+
40.00 (-eV)
  
99+
Atom
  
  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
  
HCP-Crystal-Structure-of-Magnesium.jpg#100
  
Radius of an Atom
  
  
Lattice Angles
π/2, π/2, π/2
  
π/2, π/2, 2 π/3
  
Lattice C/A Ratio
Not Available
  
Not Available
  
Adjacent Atomic Numbers
  
  
Previous Element
  
Electrical Properties
  
  
Resistivity
43.90 nΩ·m
  
99+
Electrical Conductivity
0.11 106/cm Ω
  
19
0.23 106/cm Ω
  
7
Electron Affinity
59.60 kJ/mol
  
16
0.00 kJ/mol
  
40
Magnetic Characteristics
  
  
Permeability
Not Available
  
Not Available
  
Susceptibility
Not Available
  
Not Available
  
Specific Heat
3.60 J/(kg K)
  
1
1.02 J/(kg K)
  
4
Thermal Conductivity
84.80 W/m·K
  
20
156.00 W/m·K
  
8
Critical Temperature
Not Available
  
Molar Heat Capacity
24.86 J/mol·K
  
99+
24.87 J/mol·K
  
99+
Thermal Expansion
46.00 µm/(m·K)
  
7
24.80 µm/(m·K)
  
15
Standard Molar Entropy
29.10 J/mol.K
  
99+
32.70 J/mol.K
  
99+
Enthalpy
  
  
Enthalpy of Vaporization
134.70 kJ/mol
  
99+
128.70 kJ/mol
  
99+
Enthalpy of Fusion
3.00 kJ/mol
  
99+
8.95 kJ/mol
  
39
Enthalpy of Atomization
160.70 kJ/mol
  
99+
148.50 kJ/mol
  
99+