Palladium Palladium Palladium is a chemical element with symbol Pd and atomic number 46. It is a rare and lustrous silvery-white metal discovered in 1803 by William Hyde Wollaston. He named it after the asteroid 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 a group of elements referred to as the platinum group metals (PGMs). These 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
Root element This property provides access to an object of type codice_4 which directly represents the root element of the document. There can be other XML nodes outside of the root element. In particular, the root element may be preceded by a "prolog", which itself may consist of an "XML declaration", optional comments, processing instructions and whitespace, followed by an optional "DOCTYPE declaration" and more optional comments, processing instructions and whitespace. After the root element there may be further optional comments, processing instructions and whitespace within the document. Within the root element, apart from any number of attributes and other elements, there