Properties of Praseodymium and Meitnerium
Melting Point
Not Available
  
Boiling Point
3,130.00 °C
  
27
Not Available
  
Hardness
  
  
Mohs Hardness
Not Available
  
Not Available
  
Brinell Hardness
Not Available
  
Vickers Hardness
Not Available
  
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Reflectivity
Not Available
  
Not Available
  
Speed of Sound
2,280.00 m/s
  
40
Not Available
  
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Pr
  
Mt
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Not Available
  
Sanderson Electronegativity
Not Available
  
Not Available
  
Allred Rochow Electronegativity
Not Available
  
Mulliken-Jaffe Electronegativity
Not Available
  
Not Available
  
Allen Electronegativity
Not Available
  
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Not Available
  
Ionization Energies
  
  
1st Energy Level
527.00 kJ/mol
  
99+
800.80 kJ/mol
  
15
2nd Energy Level
1,020.00 kJ/mol
  
99+
1,823.60 kJ/mol
  
17
3rd Energy Level
2,086.00 kJ/mol
  
99+
2,904.20 kJ/mol
  
31
Electrochemical Equivalent
1.75 g/amp-hr
  
40
Not Available
  
Electron Work Function
Not Available
  
Other Chemical Properties
Density
  
  
Density At Room Temperature
6.77 g/cm3
  
99+
Density When Liquid (at m.p.)
Not Available
  
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
  
Young's Modulus
Not Available
  
Poisson Ratio
Not Available
  
Other Mechanical Properties
NA
  
Symbol
Pr
  
Mt
  
Group Number
Not Available
  
Period Number
6
  
7
  
Element Family
Probably Transition
  
Atomic Weight
140.91 amu
  
99+
Atomic Volume
20.80 cm3/mol
  
15
Not Available
  
Electron Configuration
[Xe] 4f3 6s2
  
[Rn] 5f14 6d7 7s2
  
Valence Electron Potential
42.64 (-eV)
  
99+
Not Available
  
Atom
  
  
Crystal Lattice
HCP-Crystal-Structure-of-Praseodymium.jpg#100
  
FCC-Crystal-Structure-of-Meitnerium.jpg#100
  
Radius of an Atom
  
  
Van der Waals Radius
Not Available
  
Lattice Constant
Not Available
  
Lattice Angles
π/2, π/2, 2 π/3
  
NA
  
Lattice C/A Ratio
Not Available
  
Adjacent Atomic Numbers
  
  
Electrical Properties
  
  
Resistivity
Not Available
  
Electrical Conductivity
0.01 10
6/cm Ω
  
99+
Not Available
  
Electron Affinity
50.00 kJ/mol
  
21
Not Available
  
Electrical Property
Unknown
  
Magnetic Characteristics
  
  
Specific Gravity
Not Available
  
Permeability
Not Available
  
Not Available
  
Susceptibility
Not Available
  
Not Available
  
Specific Heat
0.19 J/(kg K)
  
32
Not Available
  
Thermal Conductivity
12.50 W/m·K
  
99+
Not Available
  
Critical Temperature
Not Available
  
Not Available
  
Molar Heat Capacity
27.20 J/mol·K
  
18
Not Available
  
Thermal Expansion
6.70 µm/(m·K)
  
99+
Not Available
  
Standard Molar Entropy
73.20 J/mol.K
  
10
Not Available
  
Enthalpy
  
  
Enthalpy of Vaporization
296.80 kJ/mol
  
29
Not Available
  
Enthalpy of Fusion
6.89 kJ/mol
  
99+
Not Available
  
Enthalpy of Atomization
368.00 kJ/mol
  
24
Not Available