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Palladium
Electron Configuration 2,8,18,18,0
Electron Configuration [Kr] 4d10
Electronegativity 2.20
Enthalpy of Fusion 17.2 kJ mol-1
Enthalpy of Vaporisation 361.5 kJ mol-1
Heat Capacity 25.98 J mol-1 K-1
Thermal Conductivity 71.8 W m-1 K-1
Thermal Expansion 11.8 μm m-1 K-1
Magnetic ordering No data
Electrical resistivity 105.4 Ω m
Speed of sound 3070 m s-1
Young's modulus 121 GPa
Shear modulus 3070 GPa
Bulk modulus 180 GPa
Poisson ratio 0.39
Mohs hardness 4.75
Vickers hardness 461 MPa
Brinell hardness 37.3 MPa
Atomic Radii
Atomic Radius 140 pm
Bohr Radius 169 pm
Covalent Radius 131 pm
Van der Waals 163 pm
Oxidation States
Main Pd+2
Other Pd0, Pd+4
Ionisation Energies (kJ mol-1) show graph
M - M+ 805
M+ - M2+ 1875
M2+ - M3+ 3177
M3+ - M4+ 4700
M4+ - M5+ 6300
M5+ - M6+ 8700
M6+ - M7+ 10700
M7+ - M8+ 12700
M8+ - M9+ 15000
M9+ - M10+ 17200