rho·di·um (r  d - m)n. Symbol Rh A hard, durable, silvery-white metallic element that is used to form high-temperature alloys with platinum and is plated on other metals to produce a durable corrosion-resistant coating. Atomic number 45; atomic weight 102.905; melting point 1,966°C; boiling point 3,727°C; specific gravity 12.41; valence 2, 3, 4, 5, 6. See Table at element. [Greek rhodo-, rhodo- + -ium.] |
rhodium [ˈrəʊdɪəm]
n
(Chemistry / Elements & Compounds) a hard corrosion-resistant silvery-white element of the platinum metal group, occurring free with other platinum metals in alluvial deposits and in nickel ores. It is used as an alloying agent to harden platinum and palladium. Symbol: Rh; atomic no.: 45; atomic wt.: 102.90550; valency: 2-6; relative density: 12.41; melting pt.: 1963±3°C; boiling pt.: 3697±100°C
[New Latin, from Greek rhodon rose, from the pink colour of its compounds]
| rhodium (rd-m) Symbol Rh A rare, silvery-white metallic element that is hard, durable, and resistant to acids. It is used as a permanent plating for jewelry and is added to platinum to make high-temperature alloys. Atomic number 45; atomic weight 102.905; melting point 1,966°C; boiling point 3,727°C; specific gravity 12.41; valence 2, 3, 4, 5, 6. See Periodic Table. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  rhodium - a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinummetal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. |
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