rhodium

[roh-dee-uhm]
noun Chemistry.
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:
1804; < Neo-Latin; see rhod-, -ium

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rhodium (ˈrəʊdɪəm)
 
n
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
 
[C19: New Latin, from Greek rhodon rose, from the pink colour of its compounds]

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Medical Dictionary

rhodium rho·di·um (rō'dē-əm)
n.
Symbol Rh
A hard durable metallic element. Atomic number 45; atomic weight 102.905; melting point 1,964°C; boiling point 3,700°C; specific gravity 12.41; valence 2, 3, 4, 5, 6.

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Science Dictionary
rhodium   (rō'dē-əm)  Pronunciation Key 
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.
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Example sentences
The low- and medium-level radioactive material includes toxic uranium, rhodium, and plutonium.
These holes are lined with a thin metal oxide and small particles of platinum and rhodium.
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