Palladium
Palladium 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.
A stylized shell model. Electrons are quantum objects, not particles following these literal paths. Sizes and motion are illustrative.
36 is the [Kr] core total across four shells.
At a glance
- Atomic number
- 46
- Atomic mass
- 106.421 u
- Phase
- Solid
- Density
- 12.023 g/cm³
- Melting point
- 1,828.05 K
- Boiling point
- 3,236 K
- First ionization energy
- 804.4 kJ/mol
- Electronegativity
- 2.2
- Electron affinity
- 54.24 kJ/mol
- Molar heat capacity
- 25.98 J/(mol·K)
- Period
- 5
- Appearance
- silvery white
Conditions and isotopes affect measured properties. Some properties of short-lived elements are predicted. Electronegativity uses the Pauling scale.
Keep exploring
Explore the stories, imagery, and reference data in more depth. Properties with no value in the reference are marked unavailable.