Element General Physical properties Phase solid Atomic properties Miscellaneous
PALLADIUM Name, Symbol, Number palladium, Pd, 46 Chemical series transition metals Group, Period, Block 10, 5, d Appearance silvery white metallic Atomic mass 106.42(1) g/mol Electron configuration [Kr] 4d10 Electrons per shell 2, 8, 18, 18 Density (near r.t.) 12.023 g/cm³ Liquid density at m.p. 10.38 g/cm³ Melting point 1828.05 K (1554.9 °C, 2830.82 °F) Boiling point 3236 K (2963 °C, 5365 °F) Heat of fusion 16.74 kJ/mol Heat of vaporization 362 kJ/mol Heat capacity (25 °C) 25.98 J/(mol·K) Vapor pressure P/Pa 1 10 100 1 k 10 k 100 k at T/K 1721 1897 2117 2395 2753 3234 Crystal structure cubic face centered Oxidation states ±1 (mildly basic oxide) Electronegativity 2.20 (Pauling scale) Ionization energies 1st: 804.4 kJ/mol 2nd: 1870 kJ/mol 3rd: 3177 kJ/mol Atomic radius 140 pm Atomic radius (calc.) 169 pm Covalent radius 131 pm Van der Waals radius 163 pm Magnetic ordering no data Electrical resistivity (20 °C) 105.4 nO·m Thermal conductivity (300 K) 71.8 W/(m·K) Thermal expansion (25 °C) 11.8 µm/(m·K) Speed of sound (thin rod) (20 °C) 3070 m/s Young's modulus 121 GPa Shear modulus 44 GPa Bulk modulus 180 GPa Poisson ratio 0.39 Mohs hardness 4.75 Vickers hardness 461 MPa Brinell hardness 37.3 MPa CAS registry number 7440-05-3