Crossword clues for molybdenum
Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Molybdenum \Mol`yb*de"num\, n. [NL.: cf. F. molybd[`e]ne. See Molybdena.] (Chem.) A rare element of the chromium group, occurring in nature in the minerals molybdenite and wulfenite, and when reduced obtained as a hard, silver-white, difficulty fusible metal. Symbol Mo. Atomic number 42. Atomic weight 95.94.
Douglas Harper's Etymology Dictionary
metallic element, 1816, from molybdena, used generally for lead-like minerals, from Greek molybdos "lead," also "black graphite," related to Latin plumbum "lead" (see plumb (n.)), and like it probably borrowed from a lost Mediterranean language, perhaps Iberian. The element so called because of its resemblance to lead ore.
Wiktionary
n. A metallic chemical element (''symbol'' Mo) with an atomic number of 42.
WordNet
n. a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel [syn: Mo, atomic number 42]
Wikipedia
Molybdenum is a chemical element with symbol Mo and atomic number 42. The name is from Neo-Latin molybdaenum, from Ancient Greek , meaning lead, since its ores were confused with lead ores. Molybdenum minerals have been known throughout history, but the element was discovered (in the sense of differentiating it as a new entity from the mineral salts of other metals) in 1778 by Carl Wilhelm Scheele. The metal was first isolated in 1781 by Peter Jacob Hjelm.
Molybdenum does not occur naturally as a free metal on Earth; it is found only in various oxidation states in minerals. The free element, a silvery metal with a gray cast, has the sixth-highest melting point of any element. It readily forms hard, stable carbides in alloys, and for this reason most of world production of the element (about 80%) is used in steel alloys, including high-strength alloys and superalloys.
Most molybdenum compounds have low solubility in water, but when molybdenum-bearing minerals contact oxygen and water, the resulting molybdate ion is quite soluble. Industrially, molybdenum compounds (about 14% of world production of the element) are used in high-pressure and high-temperature applications as pigments and catalysts.
are by far the most common bacterial catalysts for breaking the chemical bond in atmospheric molecular nitrogen in the process of biological nitrogen fixation. At least 50 molybdenum enzymes are now known in bacteria and animals, although only bacterial and cyanobacterial enzymes are involved in nitrogen fixation. These nitrogenases contain molybdenum in a form different from other molybdenum enzymes, which all contain fully oxidized molybdenum in a molybdenum cofactor. These various molybdenum cofactor enzymes are vital to the organisms, and molybdenum is a essential element for life in all higher eukaryote organisms, though not in all bacteria.
Usage examples of "molybdenum".
This was the other time when we met, when we were at that conference in Caracas, the one about taking molybdenum and beryllium out of seawater.
Copper, Silver, Gold, Zinc and Cadmium, Mercury, Tin, Lead, Bismuth, Antimony, Chromium, Molybdenum, Tungsten, Uranium, Manganese, Iron, Nickel, and Cobalt, the Platinum Group.
A few pounds of molybdenum, some wire-drawing apparatus, a few ounces of scandium and special glass-blowing machinery.
As the formula, which we have developed and published here, shows, it is an organic product of substitution in which the styrolene radical and the molybdenum metal occupy the six vertices of a benzine carbide.
As everyone knows today, this compound is formed by the substitution of three atoms of molybdenum and three styrolene radicals in the benzene nucleus.
All molybdenum compounds are converted into the trioxide by boiling with nitric acid.
Sample contains small amts manganese, carbon, sulfur, phosphorus, and silicon, some nickel, zirconium, and tungsten with admixture chromium, molybdenum, and vanadium.
Elements that include barium, antimony, cobalt, molybdenum and vanadium that are obtained from toxic minerals such as stibnite, barytine, patronite and mispickel.
That Molybdenum and that soldier are going to do all this, and where are they going to buy these coprocessor things?
When Matthew noted that the influx had come from the Mariana Islands and the Scottish highlands, where large deposits of deutronium and molybdenum had recently been located, and some resettled from the disastrous colonies of Bremer, he was equally ready to cancel that idea if the initial interviews proved negative.
And I ran a tap in on one of your main mines, and it's all laced with impurities: vanadium and molybdenum.
And I ran a tap in on one of your main mines, and it’s all laced with impurities: vanadium and molybdenum.
The verbal outpouring was to be on “The Interdiffusion of Molybdenum by the Renwick Process,” and its delivery was scheduled for the Regal Room of the Park-Ritz Hotel, where the cheapest room, even in depression times, was seven dollars a night.
Their reaction showed indirectly the presence of metallic iron in large quantities with traces of carbon, molybdenum- Steel!
Their reaction showed indirectly the presence of metallic iron in large quantities with traces of carbon, molybdenum Steel!