Transition metal, atomic number 46.
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.
Symbol Pd. Atomic mass 106.421 u. Group 10, period 5. Electron configuration [Kr] 4d10. Electrons per shell 2, 8, 18, 18. State at room temperature: Solid. Melting point 1554.9 °C, boiling point 2962.8 °C. Discovered by William Hyde Wollaston.
Element data from Wikipedia, CC BY-SA 3.0.