palladium
Sign in to savePalladium is a chemical element; it has the symbol Pd and atomic number 46. It is a rare and lustrous silvery-white metal discovered in 1802 by the English chemist William Hyde Wollaston. He named it after the asteroid Pallas (formally 2 Pallas), which was itself named after the epithet of the Greek goddess Athena, acquired by her when she slew Pallas. Palladium, platinum, rhodium, ruthenium, iridium and osmium form together a group of elements referred to as the platinum group metals. They have similar chemical properties, but palladium has the lowest melting point and is the least dense of t
AI overview
Palladium is a rare, silvery-white metal that was discovered in 1802 and belongs to a group of chemically similar elements called the platinum group metals. It matters because it has useful properties—notably the lowest melting point and least density among its group—that make it valuable for practical applications.
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Article
31 sectionsContents
- Characteristics
- Isotopes
- Compounds
- Palladium(II)
- Palladium(0)
- Other oxidation states
- Occurrence
- Applications
- Catalysis
- Electronics
- Technology
- Hydrogen storage
- Medicine
- Jewellery
- Photography
- Art
- Research
- Cold fusion
- Super tough metallic glass
- Alternatives
- Effects on health
- Toxicity
- Precautions
- History
- Palladium as investment
- Palladium producers
- Exchange-traded products
- Bullion coins and bars
- See also
- References
- External links
Palladium is a chemical element; it has the symbol Pd and atomic number 46. It is a rare and lustrous silvery-white metal discovered in 1802 by the English chemist William Hyde Wollaston. He named it after the asteroid Pallas (formally 2 Pallas), which was itself named after the epithet of the Greek goddess Athena, acquired by her when she slew Pallas. Palladium, platinum, rhodium, ruthenium, iridium and osmium form together a group of elements referred to as the platinum group metals. They have similar chemical properties, but palladium has the lowest melting point and is the least dense of them.
More than half the supply of palladium and its congener platinum is used in catalytic converters, which convert as much as 90% of the harmful gases in automobile exhaust (hydrocarbons, carbon monoxide, and nitrogen dioxide) into nontoxic substances (nitrogen, carbon dioxide and water vapor). Palladium is also used in electronics, dentistry, medicine, hydrogen purification, chemical applications, electrochemical sensors, electrosynthesis, groundwater treatment, and jewelry.