Properties of Bismuth and Praseodymium
Boiling Point
1,560.00 °C
  
99+
3,130.00 °C
  
27
Hardness
  
  
Mohs Hardness
Not Available
  
Vickers Hardness
Not Available
  
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Reflectivity
Not Available
  
Not Available
  
Speed of Sound
1,790.00 m/s
  
99+
2,280.00 m/s
  
40
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Bi
  
Pr
  
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
703.00 kJ/mol
  
35
527.00 kJ/mol
  
99+
2nd Energy Level
1,610.00 kJ/mol
  
33
1,020.00 kJ/mol
  
99+
3rd Energy Level
2,466.00 kJ/mol
  
99+
2,086.00 kJ/mol
  
99+
Electrochemical Equivalent
2.60 g/amp-hr
  
19
1.75 g/amp-hr
  
40
Other Chemical Properties
Density
  
  
Density At Room Temperature
6.77 g/cm3
  
99+
Density When Liquid (at m.p.)
10.05 g/cm3
  
18
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
  
  
Other Mechanical Properties
NA
  
Symbol
Bi
  
Pr
  
Group Number
Not Available
  
Period Number
6
  
6
  
Atomic Weight
140.91 amu
  
99+
Atomic Volume
21.30 cm3/mol
  
14
20.80 cm3/mol
  
15
Electron Configuration
[Xe] 4f14 5d10 6s2 6p3
  
[Xe] 4f3 6s2
  
Valence Electron Potential
41.90 (-eV)
  
99+
42.64 (-eV)
  
99+
Atom
  
  
Crystal Lattice
RHO-Crystal-Structure-of-Bismuth.jpg#100
  
HCP-Crystal-Structure-of-Praseodymium.jpg#100
  
Radius of an Atom
  
  
Lattice Angles
NA
  
π/2, π/2, 2 π/3
  
Lattice C/A Ratio
Not Available
  
Adjacent Atomic Numbers
  
  
Electrical Properties
  
  
Electrical Conductivity
0.01 106/cm Ω
  
99+
0.01 106/cm Ω
  
99+
Electron Affinity
91.20 kJ/mol
  
11
50.00 kJ/mol
  
21
Magnetic Characteristics
  
  
Permeability
Not Available
  
Susceptibility
Not Available
  
Specific Heat
0.12 J/(kg K)
  
40
0.19 J/(kg K)
  
32
Thermal Conductivity
7.97 W/m·K
  
99+
12.50 W/m·K
  
99+
Critical Temperature
Not Available
  
Not Available
  
Molar Heat Capacity
25.52 J/mol·K
  
37
27.20 J/mol·K
  
18
Thermal Expansion
13.40 µm/(m·K)
  
28
6.70 µm/(m·K)
  
99+
Standard Molar Entropy
56.70 J/mol.K
  
24
73.20 J/mol.K
  
10
Enthalpy
  
  
Enthalpy of Vaporization
151.00 kJ/mol
  
99+
296.80 kJ/mol
  
29
Enthalpy of Fusion
10.90 kJ/mol
  
33
6.89 kJ/mol
  
99+
Enthalpy of Atomization
207.10 kJ/mol
  
99+
368.00 kJ/mol
  
24