All About Palladium

Metallic chemical element, one of the transition elements, chemical symbol Pd, atomic number 46.

A precious, silver-white metal that resembles platinum chemically, it is extremely ductile and easily worked and can be beaten into thin leaf. It is an excellent catalyst for chemical reactions involving hydrogen and oxygen, such as the hydrogenation of unsaturated organic compounds. Because it does not tarnish in air at ordinary temperatures, palladium and its alloys serve as substitutes for platinum in jewelry and in electrical contacts in telecommunications equipment. Small amounts of palladium alloyed with gold yield the best white gold. Palladium is used also in dental alloys. Because hydrogen passes rapidly through the metal at high temperatures, heated palladium tubes impervious to other gases function as semipermeable membranes and are used for hydrogen purification.

Please see the Encyclopedia Britannica for more information.

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