Rhodium is a chemical element that is a rare, silvery-white, hard, and chemically inert transition metal and a member of the platinum group. It has the chemical symbol Rh and atomic number 45. It is composed of only one naturally-occurring isotope, 103Rh. Naturally occurring rhodium is usually found as the free metal, alloyed with similar metals, and rarely as a chemical compound in minerals such as bowieite and rhodplumsite. It is one of the rarest and most valuable precious metals.Symbol: Rh
Atomic number: 45
Electron configuration: Kr 4d8 5s1
Melting point: 1,963 °C
Atomic mass: 102.9055 ± 0.00002 u
Discoverers: William Hyde Wollaston