Palladium is a soft silver-white metal that resembles platinum. Palladium, along with platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs). Platinum group metals share similar chemical properties, but palladium has the lowest melting point and is the least dense of these precious metals.
The largest use of palladium today is in catalytic converters. The second biggest application of palladium in electronics is making the multilayer ceramic capacitor.
Palladium is also used in jewelry, in dentistry, watch making, in blood sugar test strips, in aircraft spark plugs and in the production of surgical instruments and electrical contacts.
Palladium is one of the three most popular metals used to make white gold alloys. (Nickel and silver can also be used.) Palladium-gold is a more expensive alloy than nickel-gold, but seldom causes allergic reactions.
"Source: Palladium. (2010, March 18). In Wikipedia, The Free Encyclopedia. Retrieved, March 26, 2010, from http://en.wikipedia.org/wiki/Palladium