Properties of Rhodium and Technetium
Melting Point
1,966.00 °C
  
12
Boiling Point
3,727.00 °C
  
17
Hardness
  
  
Mohs Hardness
Not Available
  
Brinell Hardness
Not Available
  
Vickers Hardness
1,100.00 MPa
  
9
Not Available
  
Optical Properties
  
  
Refractive Index
Not Available
  
Not Available
  
Reflectivity
Not Available
  
Speed of Sound
4,700.00 m/s
  
15
16,200.00 m/s
  
1
Allotropes
No
  
No
  
α Allotropes
Not Available
  
Not Available
  
β Allotropes
Not Available
  
Not Available
  
γ Allotropes
Not Available
  
Not Available
  
Chemical Formula
Rh
  
Tc
  
Isotopes
  
  
Electronegativity
  
  
Pauling Electronegativity
Sanderson Electronegativity
Not Available
  
Not Available
  
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Not Available
  
Not Available
  
Electropositivity
  
  
Pauling Electropositivity
Ionization Energies
  
  
1st Energy Level
719.70 kJ/mol
  
29
702.00 kJ/mol
  
36
2nd Energy Level
1,740.00 kJ/mol
  
26
1,470.00 kJ/mol
  
99+
3rd Energy Level
2,997.00 kJ/mol
  
27
2,850.00 kJ/mol
  
33
Electrochemical Equivalent
1.28 g/amp-hr
  
99+
0.52 g/amp-hr
  
99+
Electron Work Function
Not Available
  
Other Chemical Properties
Density
  
  
Density At Room Temperature
12.41 g/cm3
  
28
11.00 g/cm3
  
34
Density When Liquid (at m.p.)
10.70 g/cm3
  
14
Not Available
  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available
  
Not Available
  
Vapor Pressure at 2000 K
Not Available
  
Tensile Strength
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
Rh
  
Tc
  
Period Number
5
  
5
  
Atomic Weight
102.91 amu
  
99+
Atomic Volume
8.30 cm3/mol
  
99+
8.50 cm3/mol
  
99+
Electron Configuration
[Kr] 4d8 5s1
  
[Kr] 4d5 5s2
  
Valence Electron Potential
64.00 (-eV)
  
22
180.00 (-eV)
  
3
Atom
  
  
Crystal Lattice
FCC-Crystal-Structure-of-Rhodium.jpg#100
  
HCP-Crystal-Structure-of-Technetium.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
  
Adjacent Atomic Numbers
  
  
Electrical Properties
  
  
Resistivity
43.30 nΩ·m
  
99+
200.00 nΩ·m
  
18
Electrical Conductivity
0.21 106/cm Ω
  
8
0.07 106/cm Ω
  
30
Electron Affinity
109.70 kJ/mol
  
7
53.00 kJ/mol
  
18
Magnetic Characteristics
  
  
Permeability
Not Available
  
Not Available
  
Susceptibility
Not Available
  
Not Available
  
Specific Heat
0.24 J/(kg K)
  
22
0.21 J/(kg K)
  
29
Thermal Conductivity
150.00 W/m·K
  
9
50.60 W/m·K
  
30
Critical Temperature
Not Available
  
Not Available
  
Molar Heat Capacity
24.98 J/mol·K
  
99+
24.27 J/mol·K
  
99+
Thermal Expansion
8.20 µm/(m·K)
  
99+
7.10 µm/(m·K)
  
99+
Standard Molar Entropy
31.50 J/mol.K
  
99+
181.10 J/mol.K
  
2
Enthalpy
  
  
Enthalpy of Vaporization
495.40 kJ/mol
  
12
660.00 kJ/mol
  
6
Enthalpy of Fusion
21.76 kJ/mol
  
10
23.01 kJ/mol
  
9
Enthalpy of Atomization
556.50 kJ/mol
  
12
649.00 kJ/mol
  
8