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46Pd106.421
Palladium
Transition MetalPalladium is a chemical element with symbol Pd and atomic number 46. It is a rare and lustrous silvery-white metal discovered in 1803 by William Hyde Wollaston. He named it after the asteroid Pallas, which was itself named after the epithet of the Greek goddess Athena, acquired by her when she slew Pallas.
Phase: SolidAppearance: silvery white
2, 8, 18, 18
Physical Properties
Atomic Mass106.421 u
Density12.023 g/cm³
Melting Point1828.05 K
Boiling Point3236 K
Molar Heat25.98 J/(mol·K)
Period5
PhaseSolid
Chemical Properties
Electron Configuration1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 4d10
Semantic Config[Kr] 4d10
Shells2, 8, 18, 18
Electron Affinity54.24 kJ/mol
Electronegativity2.2
Ionization Energies
IE1: 804.4 kJ/molIE2: 1870 kJ/molIE3: 3177 kJ/mol
Discovery
Discovered byWilliam Hyde Wollaston