1) Atomic number 44 2) Chemical element 3) Element discovered in 1844 4) Element number 44 5) Element with the symbol Ru 6) Metal 7) Metallic element 8) Precious metal
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1) Ru
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https://www.crosswordclues.com/clue/ruthenium
Ruthenium is used in Platinum-Ruthenium electrodes for Methanol-fuel cells
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http://en.wikipedia.org/wiki/Glossary_of_fuel_cell_terms
Ruthenium is a chemical element with symbol Ru and atomic number 44. It is a rare transition metal belonging to the platinum group of the periodic table. Like the other metals of the platinum group, ruthenium is inert to most other chemicals. The Baltic German scientist Karl Ernst Claus discovered the element in 1844, and named it after Ruthenia, ...
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http://en.wikipedia.org/wiki/Ruthenium
• (n.) A rare element of the light platinum group, found associated with platinum ores, and isolated as a hard, brittle steel-gray metal which is very infusible. Symbol Ru. Atomic weight 103.5. Specific gravity 12.26. See Platinum metals, under Platinum.
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(Ru), chemical element, one of the platinum metals of Group VIII of the periodic table, used as an alloying agent to harden platinum and palladium. ... [5 related articles]
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http://www.britannica.com/eb/a-z/r/81
(Ru) A silvery-white, metallic element belonging to the platinum group of transition elements. Ruthenium was first discovered by Jedrzej A. Sniadecki in Vilno, Poland, in 1808, and then rediscovered By G. W. Osann in Tartu, Russia, in 1828; its name comes from Ruthenia, the Lati...
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<chemistry, element> A rare element of the light platinum group, found associated with platinum ores, and isolated as a hard, brittle steel-gray metal which is very infusible. Specific gravity 12.26. See Platinum metals, under Platinum. ... Atomic weight: 103.5 ... Abbreviation: Ru ... Origin: NL. So named from the Ruthenians, a Little Russia...
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(Ru) (roo-the´ne-әm) a chemical element, atomic number 44, atomic weight 101.07.
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http://www.encyclo.co.uk/local/21001
Abbreviated Ruth or Ru, is a precious metal that belongs to the platinum group of metals. In jewelry, ruthenium is added to platinum alloys; about 5 to 10 percent ruthenium can be added to platinum to harden and strengthen the alloy. It is atomic number is 44. ^top
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Ru·the'ni·um noun [ New Latin So named from the
Ruthenians , a Little Russian people, as coming from Russia, the metal having been found in the Ural mountains.]
(Chemistry) A rare element of the light platinum group, found associated with platinum ores, and isolated as a hard, brittle stee...
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http://www.encyclo.co.uk/webster/R/107
(Ru) Type: Term Pronunciation: rū-thē′nē-ŭm Definitions: 1. A metallic element of the platinum group; atomic no. 44, atomic wt. 101.07; 106Ru, with a half-life of 1.020 years, has been used in the treatment of certain eye problems.
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http://www.medilexicon.com/medicaldictionary.php?t=79230
Ruthenium is a metal element of the platinum group of elements, occurring in the Urals and Americas. It is a hard, brittle, grey metal that forms ruthenious and ruthenic salts, of a reddish brown colour, of which ruthenious chloride gives a characteristic fine black precipitate with water.
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http://www.probertencyclopaedia.com/browse/GR.HTM
[
n] - a rare polyvalent metallic element of the platinum group
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Chemical symbol Ru. A white metal noted for its harness; the most expensive of the platinum group
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https://steelforge.com/literature/steelog-the-5000-word-metals-glossary/
Ruthenium is a rare member of the platinum group of metals. It is a lustrous, silvery coloured metal which is unaffected by air, water and acids, but is soluble in fused alkalis. Extraction of the metal is achieved by several techniques; for example, extraction of the mixed platinum group metals by dissolution in aqua regia, followed by treatment o...
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Ru noun a rare polyvalent metallic element of the platinum group; it is found associated with platinum
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https://www.encyclo.co.uk/local/20974
Hard, brittle, silver-white, metallic element, atomic number 44, relative atomic mass 101.07. It is one of the so-called platinum group of metals; it occurs in platinum ores as a free metal and in the natural alloy osmiridium. It is used as a hardener in alloys and as a catalyst; its compounds are used as colouring agents in glass a...
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a steel-gray, rare metallic element, belonging to the platinum group of metals. Symbol: Ru; at. wt.: 101.07; at. no.: 44; sp. gr.: 12.2 at 20°C.
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https://www.infoplease.com/dictionary/ruthenium
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