rhodium

[ roh-dee-uhm ]

nounChemistry.
  1. a silvery-white metallic element of the platinum family, forming salts that give rose-colored solutions: used to electroplate microscopes and instrument parts to prevent corrosion. Symbol: Rh; atomic weight: 102.905; atomic number: 45; specific gravity: 12.5 at 20°C.

Origin of rhodium

1
From New Latin, dating back to 1804; see origin at rhod-, -ium

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British Dictionary definitions for rhodium

rhodium

/ (ˈrəʊdɪəm) /


noun
  1. 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

Origin of rhodium

1
C19: New Latin, from Greek rhodon rose, from the pink colour of its compounds

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Scientific definitions for rhodium

rhodium

[ dē-əm ]


Rh
  1. 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.

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