|
A copper nugget.
NounSingular copper Plural countable and uncountable; plural coppers copper (countable and uncountable; plural coppers)
SynonymsDerived termsterms derived from copper
Related termsterms related to copper
From Wiktionary under the GNU Free Documentation License. Copper (pronounced /ˈkɒpər/, KOP-ər) is a chemical element with the symbol Cu (Latin: cuprum) and atomic number 29. It is a ductile metal with very high thermal and electrical conductivity. Pure copper is rather soft and malleable and a freshly-exposed surface has a pinkish or peachy color. It is used as a thermal conductor, an electrical conductor, a building material, and a constituent of various metal alloys. copper disc made by continuous casting, etchedCopper metal and alloys have been used for thousands of years. In the Roman era, copper was principally mined on Cyprus, hence the origin of the name of the metal as Cyprium, "metal of Cyprus", later shortened to Cuprum. There may be insufficient reserves to sustain current high rates of copper consumption. Some countries, such as Chile and the United States, still have sizable reserves of the metal which are extracted through large open pit mines. Copper compounds are known in several oxidation states, usually 2+, where they often impart blue or green colors to natural minerals such as turquoise and have been used historically widely as pigments. Copper as both metal and pigmented salt, has a significant presence in decorative art. Copper 2+ ions are soluble in water, where they function at low concentration as bacteriostatic substances and fungicides. For this reason, copper metal can be used as an anti-germ surface that can add to the anti-bacterial and antimicrobial features of buildings such as hospitals. In sufficient amounts, copper salts can be poisonous to higher organisms as well. However, despite universal toxicity at high concentrations, the 2+ copper ion at lower concentrations is an essential trace nutrient to all higher plant and animal life. In animals, including humans, it is found widely in tissues, with concentration in liver, muscle, and bone. It functions as a co-factor in various enzymes and in copper-based pigments. From Wikipedia under the
GNU Free Documentation License  evgrieve.com Grieve Mon, 05 Oct 2009 10:56:01 GM Well, now that those sheets have been removed from the corner floor-to-ceiling windows at the . Copper. Building on Avenue B and 13th Street, an EV Grieve reader comments (with disturbing enthusiasm), "I hope that they never get blinds. ...  edubook.com Kennedy Allen ue, 29 Sep 2009 17:00:59 GM The type of cookware one uses nowadays can vary widely. There are so many options, from plain steel, aluminum, iron cast, etc. that all have their different.  illusionofprosperity.blogspot.com Stagflationary Mark Sun, 27 Sep 2009 05:19:00 GM As a metal heavily dependent on prevailing sentiment and consensus economic outlook in the best of times, it shouldn't be surprising that . copper. was hit abnormally hard in the worst of times. By the time the dust from the panic settled ... From Google Blog Search: "copper"  news.google.com Daily Mail European Goldfields is now on track to produce over 42000 ounces of gold per annum (and 3000 tons of copper , 52000 tons of lead and 39000 tons of zinc) in ... Sector movers: Miners lead fightback ShareCast Euro Goldfields gets initial nod for Greek mines Reuters all 23 news articles » news.google.com Mumbai Mirror RPF constable SL Kamble, 32, the first person to reach the spot after the incident, suspected the attackers to be thieves involved in stealing copper bonds ... news.google.com Bloomberg Copper fell 1 percent. The yen climbed against all but one of the 16 most-traded currencies tracked by Bloomberg. The cost of insuring investment-grade ... and more » From Google News Search: "copper"  cyberwest.com 233px x 290px | 31.70kB [source page] Striking powder gold at Copper Mountain March 21 2002 In mid March our season long quest for a powder day in a generally dry season was rewarded when we woke early checked the ski report spotted 9 inches of new snow at Copper Mountain blew  ucan.foad.org 875px x 686px | 245.20kB [source page] copper sweater 02 si > 27 Aug 2004 11 31 178k copper sweater 02 th > 27 Aug 2004 11 31 16k copper sweater 03 jpg 27 Aug 2004 11 31 245k copper sweater 03 si > 27 Aug 2004 11 31 177k From Yahoo Image Search: "copper" 58 foot of copper AC pipe were taken from the house we about to purchase. How much will it cost to replace? Q. we are buying a HUD home. had the house inspected today and one of the issue we found was the copper pipe for the Air Condition inside the house were stolen. 58 foot of it were gone. we only have a week before closing. my question is how much would it cost to have it replace by professional Air Condition installer? i was told by the home inspector that the copper pipe/copper line were missing. Thank you in advance for your time. I am from Dallas Texas area :) Asked by Thank You - Mon Jun 25 22:19:00 2007 - - 5 Answers - 0 Comments A. I can tell you it ant gonna be cheap with as high as copper prices are Answered by badtothebone2341 - Mon Jun 25 22:25:21 2007 When did the US stop minting a solid copper penny and what percent of zinc and copper are used now? Q. When did the US stop minting a solid copper penny and what percent of zinc and copper are used now? Is it worth hoarding pennies? Asked by USAFret - Sat Sep 29 09:32:04 2007 - - 1 Answers - 0 Comments A. Currently they are 97.5% zinc and 2.5% copper. In 1982 they switched from 95% copper and 5% zinc (they made both that year). It is not really worth hoarding pennies, since right now the melt value is of post 1982 pennies are $0.0079256 and the pre 1982 are $0.0244212. The cost of melting and separating is too expensive (and illegal). BTW, the last year they were 100% copper was 1857 Try getting and selling old silver coins. They are worth about 10X face value. Answered by NYC_Since_the_90s - Sat Sep 29 09:51:56 2007 What chemical property is shared by copper oxide, copper hydroxide, and copper carbonate?
Q. and also, what chemical test could you use to distinguish between copper sulfate pentahydrate and copper carbonate, both of which are blue solids? Asked by Clinton P - Fri Feb 6 02:14:54 2009 - - 2 Answers - 0 Comments A. They're all basic, so will react with dilute HCl. That is also the answer to the second question. Answered by Gervald F - Fri Feb 6 02:34:57 2009 From Yahoo Answer Search: "copper" |
