Crossword clues for rhodium
The Collaborative International Dictionary
Rhodium \Rho"di*um\, n. [NL., fr. Gr. "ro`don the rose. So called from the rose-red color of certain of its solutions. See Rhododendron.] (Chem.) A rare element of the light platinum group. It is found in platinum ores, and obtained free as a white inert metal which it is very difficult to fuse. Symbol Rh. Atomic weight 104.
Specific gravity 1
Douglas Harper's Etymology Dictionary
hard white metallic element, 1804, Modern Latin, coined by its discoverer, English physician William H. Wollaston (1766-1828), and named for the color of solutions containing it, from Greek rhodon "rose" (see rose (n.1)) + metallic element ending -ium.
Wiktionary
n. A metallic chemical element (''symbol'' Rh) with an atomic number of 45.
WordNet
n. a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum [syn: Rh, atomic number 45]
Wikipedia
Rhodium is a chemical element with symbol Rh and atomic number 45. It is a rare, silvery-white, hard, and chemically inert transition metal. It is a member of the platinum group. It has only one naturally occurring isotope, Rh. Naturally occurring rhodium is usually found as the free metal, alloyed with similar metals, and rarely as a chemical compound in minerals such as bowieite and rhodplumsite. It is one of the rarest and most valuable precious metals.
Rhodium is a noble metal, resistant to corrosion, found in platinum or nickel ores together with the other members of the platinum group metals. It was discovered in 1803 by William Hyde Wollaston in one such ore, and named for the rose color of one of its chlorine compounds, produced after it reacted with the powerful acid mixture aqua regia.
The element's major use (approximately 80% of world rhodium production) is as one of the catalysts in the three-way catalytic converters in automobiles. Because rhodium metal is inert against corrosion and most aggressive chemicals, and because of its rarity, rhodium is usually alloyed with platinum or palladium and applied in high-temperature and corrosion-resistive coatings. White gold is often plated with a thin rhodium layer to improve its appearance while sterling silver is often rhodium-plated for tarnish resistance.
Rhodium detectors are used in nuclear reactors to measure the neutron flux level.
Usage examples of "rhodium".
Horn pens, tortoise-shell pens, nibs of diamond or ruby imbedded in tortoise shell, nibs of ruby set in fine gold, nibs of rhodium and of iridium imbedded in gold,-- all have been adopted at different times, but most of them have been found too costly for general adoption.
With scarcely any sign to show that they had come and gone, they had carefully withdrawn his identification papers, a packet of letters from his father, and even his capsular introduction to Hinrik of Rhodia.
Jonti had chevied him to Rhodia and, consequently, succeeded in bringing him before the Tyranni.
In it we find 'A perfume for a sweet bagg,' as follows: 'Take half a pound of Cypress Roots, a pound of Orris, 3 quarter of a pound of Calamus, 3 Orange stick with Cloves, 2 ounces of Benjamin, 3 quarters of a pound of Rhodium, a pound of Coriander seed, and an ounce of Storax and 4 pecks of Damask Rose leaves, a peck of dryed sweet Marjerum, a pretty stick of Juniper shaved very thin, some lemon pele dryed and a stick of Brasill.
It is keyed to the second triad of the periodic table, rhodium and ruthenium and palladium, in very much the same way that ferromagnetism is keyed to the first triad, iron and nickel and cobalt.
It is keyed to the second triad of the periodic table, rhodium and ruthenium and palladium, in very much the same way that ferromagnetism is keyed to the first triad, iron and nickel and cobalt.