Properties of Lead and Molybdenum
Boiling Point
1,740.00 °C
  
99+
Hardness
  
  
Brinell Hardness
1,370.00 MPa
  
7
Vickers Hardness
Not Available
  
1,400.00 MPa
  
6
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Reflectivity
Not Available
  
Speed of Sound
1,190.00 m/s
  
99+
5,400.00 m/s
  
6
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Pb
  
Mo
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
715.60 kJ/mol
  
31
684.30 kJ/mol
  
37
2nd Energy Level
1,450.50 kJ/mol
  
99+
1,560.00 kJ/mol
  
37
3rd Energy Level
3,081.50 kJ/mol
  
23
2,618.00 kJ/mol
  
99+
Electrochemical Equivalent
3.87 g/amp-hr
  
9
0.89 g/amp-hr
  
99+
Other Chemical Properties
Density
  
  
Density At Room Temperature
11.34 g/cm3
  
33
10.28 g/cm3
  
36
Density When Liquid (at m.p.)
10.66 g/cm3
  
15
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available
  
Vapor Pressure at 2000 K
Not Available
  
Viscosity
Not Available
  
Not Available
  
Elasticity properties
  
  
Other Mechanical Properties
Symbol
Pb
  
Mo
  
Period Number
6
  
5
  
Atomic Volume
18.17 cm3/mol
  
27
9.40 cm3/mol
  
99+
Electron Configuration
[Xe] 4f14 5d10 6s2 6p2
  
[Kr] 4d5 5s1
  
Valence Electron Potential
24.20 (-eV)
  
99+
88.60 (-eV)
  
13
Atom
  
  
Crystal Lattice
FCC-Crystal-Structure-of-Lead.jpg#100
  
BCC-Crystal-Structure-.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
208.00 nΩ·m
  
16
53.40 nΩ·m
  
99+
Electrical Conductivity
0.05 106/cm Ω
  
36
0.19 106/cm Ω
  
11
Electron Affinity
35.10 kJ/mol
  
28
71.90 kJ/mol
  
14
Magnetic Characteristics
  
  
Permeability
Not Available
  
Not Available
  
Susceptibility
Not Available
  
Not Available
  
Specific Heat
0.13 J/(kg K)
  
39
0.25 J/(kg K)
  
21
Thermal Conductivity
35.30 W/m·K
  
38
138.00 W/m·K
  
12
Critical Temperature
Not Available
  
Not Available
  
Molar Heat Capacity
26.65 J/mol·K
  
26
24.06 J/mol·K
  
99+
Thermal Expansion
28.90 µm/(m·K)
  
13
4.80 µm/(m·K)
  
99+
Standard Molar Entropy
64.80 J/mol.K
  
17
28.70 J/mol.K
  
99+
Enthalpy
  
  
Enthalpy of Vaporization
179.40 kJ/mol
  
99+
594.10 kJ/mol
  
8
Enthalpy of Fusion
4.77 kJ/mol
  
99+
27.61 kJ/mol
  
5
Enthalpy of Atomization
194.60 kJ/mol
  
99+
653.00 kJ/mol
  
7