rhodium rodiom (#) Fr.: rhodium A metallic chemical element; symbol Rh. Atomic number 45; atomic weight 102.9055; melting point about 1,966°C; boiling point 3,727±100°C; specific gravity 12.41 at 20°C. Rhodium was discovered in 1803 by the English chemist and physicist William Hyde Wollaston during experiments on crude platinum ore. See also: The name derives from Gk. rhodon “rose” because of the “rose color of dilute solutions of its salts.” |