Properties of Technetium and Francium
Hardness
  
  
Mohs Hardness
Not Available
  
Not Available
  
Brinell Hardness
Not Available
  
Not Available
  
Vickers Hardness
Not Available
  
Not Available
  
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Reflectivity
Not Available
  
Not Available
  
Speed of Sound
16,200.00 m/s
  
1
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
Tc
  
Fr
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Not Available
  
Not Available
  
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
702.00 kJ/mol
  
36
380.00 kJ/mol
  
99+
2nd Energy Level
1,470.00 kJ/mol
  
99+
Not Available
  
3rd Energy Level
2,850.00 kJ/mol
  
33
Not Available
  
Electrochemical Equivalent
0.52 g/amp-hr
  
99+
8.32 g/amp-hr
  
1
Electron Work Function
Not Available
  
Not Available
  
Other Chemical Properties
Density
  
  
Density At Room Temperature
11.00 g/cm3
  
34
1.87 g/cm3
  
99+
Density When Liquid (at m.p.)
Not Available
  
Not Available
  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available
  
Not Available
  
Vapor Pressure at 2000 K
Not Available
  
Not Available
  
Tensile Strength
Not Available
  
Not Available
  
Viscosity
Not Available
  
Not Available
  
Elasticity properties
  
  
Shear Modulus
Not Available
  
Not Available
  
Bulk Modulus
Not Available
  
Not Available
  
Young's Modulus
Not Available
  
Not Available
  
Poisson Ratio
Not Available
  
Not Available
  
Other Mechanical Properties
NA
  
NA
  
Symbol
Tc
  
Fr
  
Period Number
5
  
7
  
Atomic Volume
8.50 cm3/mol
  
99+
Not Available
  
Electron Configuration
[Kr] 4d5 5s2
  
[Rn] 7s1
  
Valence Electron Potential
180.00 (-eV)
  
3
8.00 (-eV)
  
99+
Atom
  
  
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100
  
BCC-Crystal-Structure-.jpg#100
  
Radius of an Atom
  
  
Atomic 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
200.00 nΩ·m
  
18
Electrical Conductivity
0.07 106/cm Ω
  
30
0.03 106/cm Ω
  
40
Electron Affinity
53.00 kJ/mol
  
18
Not Available
  
Magnetic Characteristics
  
  
Specific Gravity
Not Available
  
Permeability
Not Available
  
Not Available
  
Susceptibility
Not Available
  
Not Available
  
Specific Heat
0.21 J/(kg K)
  
29
Not Available
  
Thermal Conductivity
50.60 W/m·K
  
30
15.00 W/m·K
  
99+
Critical Temperature
Not Available
  
Not Available
  
Molar Heat Capacity
24.27 J/mol·K
  
99+
Not Available
  
Thermal Expansion
7.10 µm/(m·K)
  
99+
Not Available
  
Standard Molar Entropy
181.10 J/mol.K
  
2
Not Available
  
Enthalpy
  
  
Enthalpy of Vaporization
660.00 kJ/mol
  
6
Not Available
  
Enthalpy of Fusion
23.01 kJ/mol
  
9
Not Available
  
Enthalpy of Atomization
649.00 kJ/mol
  
8
71.00 kJ/mol
  
99+