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
Greek mythology in popular culture bodies have been named after elements of Greek mythology. The constellation of Scorpius represents the scorpion that attacked Hercules and the scorpions that frighted the horses when Phaëton was driving the sun-chariot; while Capricorn may represent Pan in a myth that tells of his escape from Typhon by jumping into the water while turning into an animal - the half in the water turned into a fish and the other half turned into a goat. 1108 Demeter, a main-belt asteroid discovered by Karl Reinmuth on May 31, 1929, is named after the Greek goddess of fruitful soil and agriculture. The