Palladium (Pd)

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.

Atomic Number

46

Atomic Mass

106.42 u

Category

transition metal

Phase

solid

Density

12.023 g/cm³

Electron Shells

2, 8, 18, 18

Atomic Structure

Protons: 46 • Electrons: 46 • Neutrons: Varies by isotope

Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 4d¹⁰

Discovery

1803 • William Hyde Wollaston