Period 5 element and because of its rarity, rhodium is usually alloyed with platinum or palladium and applied in high-temperature and corrosion-resistive coatings. White gold is often plated with a thin rhodium layer to improve its optical impression while sterling silver is often rhodium plated for tarnish resistance. Rhodium detectors are used in nuclear reactors to measure the neutron flux level. Palladium is a chemical element with the chemical symbol Pd and an atomic number of 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
Locations in the United States with an English name spelling of an English place (in this case Hertford). The American capital Washington, D.C. is named after the first U.S. President George Washington, whose surname was due to his family holding land in Washington, County Durham. • The state itself is named after a rural village in Cornwall. Locations in the United States with an English name A large number of places in the U.S were named after places in England largely as a result of English settlers and explorers of the Thirteen Colonies. Some names were carried over directly and are found throughout the country (such as Manchester, Birmingham