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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 is found as a free metal and alloyed with other platinum-group metals in placer deposits and in nickel-copper deposits. It is one of the six platinum-group metals, which are metals that are chemically similar and often found together.

Palladium is highly resistant to corrosion and is used in various applications due to its excellent catalytic properties. It is used in catalytic converters in automobiles to reduce emissions, in electronics for its conductive properties, and in dentistry for its use in dental alloys. Palladium is also used in jewelry and as a component in some surgical instruments.

Palladium is a precious metal, and its price can fluctuate based on market demand and supply. It is often traded on commodity exchanges and is used as a store of value. Palladium has a melting point of 1,554.9 degrees Celsius and a boiling point of 2,963 degrees Celsius. It is a good conductor of heat and electricity and is relatively dense, with a density of 12.02 grams per cubic centimeter.

Palladium is not known to have any biological role and is considered toxic in large amounts. It can cause skin irritation and allergic reactions in some individuals. Palladium is also a component of some industrial catalysts, which can be hazardous if not handled properly. Overall, palladium is a versatile and valuable metal with a wide range of applications.