Palladium
Palladium (钯, symbol Pd) is chemical element number 46, a Transition Metal in period 5, group 10 of the periodic table, with a standard atomic weight of about 106.42. Silvery-white precious metal. Crucial for hydrogen storage and catalytic converters.
Properties
| Atomic number | 46 |
|---|---|
| Symbol | Pd |
| Atomic mass | 106.42 u |
| Category | Transition Metal |
| Period | 5 |
| Group | 10 |
| Electron configuration | [Kr] 4d¹⁰ |
| Electronegativity | 2.2 |
| Covalent radius | 139 pm |
| Density | 12.02 g/cm³ |
| Melting point | 1828.05 K |
| Boiling point | 3236 K |
| Discovery | William Hyde Wollaston, 1803 |
Overview
Silvery-white precious metal. Crucial for hydrogen storage and catalytic converters. Palladium (Pd) is a Transition Metal with atomic number 46, located in period 5, group 10. As a transition metal it commonly shows several oxidation states, forms coloured compounds, and is widely used in catalysts and alloys.
With 18 electrons in its outermost shell, Palladium bonds accordingly; full configuration [Kr] 4d¹⁰, electronegativity 2.2. At room temperature it is normally a solid; it melts near 1828.05 K (1554.9 °C), boils near 3236 K (2962.9 °C), has a density around 12.02 g/cm³.
Common applications range across Catalysis, Electronics / Semiconductors and Precious Metal. It was first described by William Hyde Wollaston in 1803.
Electron shells
Electrons per shell: 2 · 8 · 18 · 18
Main uses
- Catalysis
- Electronics / Semiconductors
- Precious Metal
Hazard
Compounds containing Palladium
No compounds in this knowledge base contain Palladium yet.
Data sources
Atomic mass uses IUPAC (CIAAW) standard atomic weights; the covalent radius is from Cordero et al. (2008). Verify on the RSC Periodic Table, PubChem and Wikipedia. Educational reference only.