Rhodium

Rhodium (Rh 101), a rare metal discovered at the beginning of the present century by Wollaston. The metal occurs in only a few rare minerals usually associated with platinum and its allied metals. It has a specilic gravity of 121, and is a, silver-white metal resembling aluminium in appearance. It is insoluble in acids, but as an alloy may be dissolved by aqua regia. The solutions of its salts form rose-red liquids, from which fact the name of the element was derived.