A moderately hard, silvery-white, metallic element
belonging to the platinum group of
transition elements. Rhodium
was discovered by William Wollaston in
London in 1803; its name comes from the Greek rhodon meaning "rose."
It occurs associated with platinum and
its chief source is a by-product of nickel
Rhodium resists tarnishing and corrosion;
it is used in hard platinum alloys, as a mirror
surface, to plate jewellery, and in an alloy with platinum as a catalyst
in the Ostwald process. Its most
common isotope is 103Rh (100%).
|relative atomic mass