In chemistry, Pd is the chemical symbol and abbreviation for the element Palladium.
Palladium is a chemical element with the symbol Pd and atomic number 46. It is a rare and lustrous silvery-white metal discovered in 1803 by William Hyde Wollaston. Palladium belongs to the platinum group metals and shares similar chemical properties. It is used in a variety of applications, including catalytic converters, jewelry, dentistry, and electronics.
Palladium's key characteristics include:
- Catalytic Activity: Palladium is an excellent catalyst, meaning it speeds up chemical reactions without being consumed itself. This is why it is used extensively in catalytic converters in automobiles to reduce harmful emissions.
- Hydrogen Absorption: Palladium can absorb significant amounts of hydrogen, making it useful in hydrogen storage and purification technologies.
- Corrosion Resistance: Palladium is resistant to corrosion and tarnishing, making it suitable for jewelry and other applications where appearance is important.
- Malleability and Ductility: Palladium can be easily shaped and drawn into wires, making it versatile in manufacturing.
Here's a summary in table form:
| Feature | Description |
|---|---|
| Chemical Symbol | Pd |
| Atomic Number | 46 |
| Element Name | Palladium |
| Category | Platinum Group Metal |
| Key Use | Catalysis (e.g., catalytic converters) |
Therefore, when you see "Pd" in a chemical context, it almost always refers to the element Palladium.
