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In chemistry, a metal ( , Μέταλλο) is a chemical element whose atoms readily lose electrons to form positive ions (cations), and form metallic bonds between other metal atoms and ionic bonds between nonmetal atoms.Mortimer, Charles E. Chemistry: A Conceptual Approach. 3rd ed. New York: D. Van Nostrad Company, 1975.

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Wikipedia About Metals

In chemistry, a metal ( , Μέταλλο) is a chemical element whose atoms readily lose electrons to form positive ions (cations), and form metallic bonds between other metal atoms and ionic bonds between nonmetal atoms.Mortimer, Charles E. Chemistry: A Conceptual Approach. 3rd ed. New York: D. Van Nostrad Company, 1975.

Definition

Metals are sometimes described as a lattice of positive ions surrounded by a cloud of delocalized electrons. They are one of the three groups of elements as distinguished by their ionization and bonding properties, along with the metalloids and nonmetals. On the periodic table, a diagonal line drawn from boron (B) to polonium (Po) separates the metals from the nonmetals. Most elements on this line are metalloids, sometimes called semi-metals; elements to the lower left are metals; elements to the upper right are nonmetals (see the periodic table showing the metals).

An alternative definitionFact: date=August 2008 of metals is that they have overlapping conduction bands and valence bands in their electronic structure. This definition opens up the category for metallic polymers and other organic metals, which have been made by researchers and employed in high-tech devices. These synthetic materials often have the characteristic silvery-grey reflectiveness (luster) of elemental metals.

Chemical properties

Metals are usually inclined to form cations through electron loss, reacting with oxygen in the air to form oxides over changing timescales (iron rusts over years, while potassium burns in seconds). Examples:

4Na + O2 → 2Na2O (sodium oxide)
2Ca + O2 → 2CaO (calcium oxide)
4Al + 3O2 → 2Al2O3 (aluminium oxide)

The transition metals (such as iron, copper, zinc, and nickel) take much longer to oxidize. Others, like palladium, platinum and gold, do not react with the atmosphere at all. Some metals form a barrier layer of oxide on their surface which cannot be penetrated by further oxygen molecules and thus retain their shiny appearance and good conductivity for many decades (like aluminium, some steels, and titanium). The oxides of metals are generally basic (as opposed to those of nonmetals, which are acidic.

Painting, anodising or plating metals are good ways to prevent their corrosion. However, a more reactive metal in the electrochemical series must be chosen for coating, especially when chipping of the coating is expected. Water and the two metals form an electrochemical cell, and if the coating is less reactive than the coatee, the coating actually promotes corrosion.

Physical properties

Gallium1%20640x480.jpg

Density

The majority of metals have higher densities than the majority of nonmetals. Nonetheless, there is wide variation in the densities of metals; lithium is the least dense solid element and osmium is the densest. The metals of groups I A and II A are referred to as the light metals because they are exceptions to this generalization. The high density of most metals is due to the tightly-packed crystal lattice of the metallic structure. The strength of metallic bonds for different metals reaches a maximum around the center of the transition series, as those elements have large amounts of delocalized electrons in a metallic bond. However, other factors (such as atomic radius, nuclear charge, number of bonding orbitals, overlap of orbital energies, and crystal form) are involved as well.

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News about Metals

(AFX UK Focus) 2009-05-11 09:00 UPDATE 1-China publishes revitalisation plan for metals

Interactive InvestorBEIJING/HONG KONG, May 11 (Reuters) - China will restrict new aluminium projects for three years and push for consolidation of base metals production, the State Council said on Monday, as it published a plan to revitalise the sector. This policy may affect a plan of Aluminum Corp of China Ltd (Chalco), which has asked Beijing for approval to add 250,000 tonnes of primary aluminium capacity at ...http://www.iii.co.uk/news/?type=afxnews&articleid=7313037&su...

(AFX UK Focus) 2009-05-11 07:12 China publishes revitalisation plan for metals

Interactive InvestorBEIJING, May 11 (Reuters) - China will restrict new aluminium projects for three years and push for consolidation of base metals production, the State Council said on Monday, as it published a plan to revitalise the sector. The plan, a draft of which was published in February, will seek to have 3-5 big firms by 2011, with the top 10 firms controlling 90 percent of copper production by 2011, 70 ...http://www.iii.co.uk/news/?type=afxnews&articleid=7312816&su...

Metals Stocks: Copper falls as economic worries return; gold dips

Market WatchCopper futures fall more than 3%, pacing losses in crude oil and stocks, as worries return that demand from China, the world’s biggest copper consumer, may slow.http://www.marketwatch.com/enf/rss.asp?guid=%7B04EAE1DB-1909...

Australia, New Zealand Stocks: Lend Lease, Murchison Metals

BloombergMay 11 (Bloomberg) -- Australia’s S&P/ASX 200 Index fell 0.4 percent to close at 3,926. New Zealand’s NZX 50 Index declined 1.5 percent to 2,829.22 in Wellington.http://www.bloomberg.com/apps/news?pid=20601081&sid=awAXS8cm...

BASE METALS

MinewebIs it time to 'sell in May and go away' again? After such a surprisingly robust early year performance, is it now time to heed that old stock market adage: "sell in May and go away"? Andy Home* explores the question.http://www.mineweb.net/mineweb/view/mineweb/en/page36?oid=83...

News about Metals

DJ BASE METALS HIGHLIGHTS: Top Stories Of The Day

Investors Business DailyNickel prices traded lower Monday despite more news of nickel project delays, and analysts said the metal is being sold due to ongoing concerns of poor stainless steel demand. Rio Tinto: Chairman To Start UK Hldr Meetings This Week LONDON (Dow Jones ... http://www.investors.com/NewsAndAnalysis/Article.aspx?id=939...

CIBER Launches Mining and Metals Solution, A Qualified SAP(R) Business ...

Denver PostGREENWOOD VILLAGE, Colo., May 11 /PRNewswire-FirstCall/ -- CIBER, Inc. (NYSE: CBR) today announced the launch of the CIBER Core Mining Solution, a packaged implementation solution that provides mining and metal companies with software, implementation ... http://www.denverpost.com/coloradocorporatestatements/ci_123...

Gold edges down as risk appetite returns

Guardian UnlimitedBuying precious metals to back ETFs has been a significant source of demand for gold and silver in recent years, and is increasingly important for platinum and palladium.http://www.guardian.co.uk/business/feedarticle/8500473

Lonmin Plans Rights Offer to Raise About $457 Million (Update3)

BloombergMay 11 (Bloomberg) -- Lonmin Plc , the world’s third-largest platinum producer, plans to raise about $457 million in a rights offer to help repay debt after metals prices plunged. Shareholders Xstrata Plc and M&G Investment Management Ltd. agreed ... http://www.bloomberg.com/apps/news?pid=20601116&sid=aMQGtZd2...

Lonmin launches rights issue

ReutersThe firm swung to a loss, which analysts said was deeper than expected, and scrapped its dividend in the first half after metals prices fell. The London-listed firm, which has operations in South Africa, resorted to the cash call because of the weak ... http://www.reuters.com/article/companyNews/idUKTRE54A0LO2009...

Search results for Metals

metals - Hutchinson encyclopedia article about metals

Any of a class of chemical elements with specific physical and chemical characteristics. Metallic elements compose about 75% of the 112 elements in the periodic table of the ... http://encyclopedia.farlex.com/Metals

Category:Metals - Wikipedia, the free encyclopedia

This page lists metals, with subdivisions for alloys and specialised subsets of metal and metal-based compounds. See also: Periodic table (metals and non-metals)http://en.wikipedia.org/wiki/Category:Metals

Chem4Kids.com: Elements & Periodic Table: Metals

Chem4Kids.com! The web site that teaches the basics of chemistry to everyone!http://www.chem4kids.com/files/elem_metal.html

Metals USA

Welcome to Metals USA. Metals USA is one of the top 10 metal service center companies in North America, with approximately ... http://www.metalsusa.com/

Current Primary and Scrap Metal Prices - LME (London Metal Exchange ...

Metals Prices and News. London Metal Exchange LME, Nickel Alloys, Nickel, Copper, Aluminum, Tin,Lead, Zinc, Titanium, Chrome, Cobalt, Molybdenum, Vanadium, Tungsten, historical ... http://metalprices.com/

Wikipedia results for Metals

Metal - Wikipedia, the free encyclopedia

Metals are sometimes described as a lattice of positive ions surrounded by a cloud of delocalized electrons. They are one of the three groups of elements as distinguished by their ... http://en.wikipedia.org/wiki/Metal

Category:Metals - Wikipedia, the free encyclopedia

This page lists metals, with subdivisions for alloys and specialised subsets of metal and metal-based compounds. See also: Periodic table (metals and non-metals)http://en.wikipedia.org/wiki/Category:Metals

Toxic metal - Wikipedia, the free encyclopedia

Toxic metals are metals that form poisonous soluble compounds and have no biological role, i.e. are not essential minerals, or are in the wrong form. Often heavy metals are thought ... http://en.wikipedia.org/wiki/Toxic_metals

Platinum group - Wikipedia, the free encyclopedia

The platinum group metals (abbreviated as the PGMs; alternatively, the platinum group or platinum metals) sometimes collectively refers to six metallic elements clustered together ... http://en.wikipedia.org/wiki/Platinum_metals

Precious metal - Wikipedia, the free encyclopedia

A precious metal is a rare metallic chemical element of high economic value. Chemically, the precious metals are less reactive than most elements, have high lustre, are softer or ... http://en.wikipedia.org/wiki/Precious_metals
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Answers for Metals

billybobHow do precious metals do in a recession?billybobYou do not want to own precious metals in a recession. During a recession, the Fed tends to lower interest rates (making money cheap) to spur the economy into recovery. Cars and housing tend to well...bazzoookajoeCan a stip of metal or metals bend due to electricity running through it?bazzoookajoeany metal which heats because of internal resistances should bend or curl. Extreme heat. I would say ordinary sheet metal of steel would do it quite easily. Copper and other metals maybe not so much. ...sirvenom5What metals are used to build tanks and ships?sirvenom5The M-1 is made out of Chobham, RHA, steel encased depleted uranium mesh plating, the Tiger (I and II) has a 25–110 mm (0.98–4.3 in) steel plating, and the "Old Salt" [USS Nimitz (CVN-68)]'s mater...metals????Like they said, Carbon IS NOT a metal. As for the strongest metal, the periodic element tungsten is the answer. It is the heaviest metal on earth. The word "tungsten" comes from the Swedish wor...Shay GuyHow would the world be affected if precious metals became far more plentiful?Shay GuyThere would be winners and losers. The winners: Scientists that use gold foil and wires in satellites. Electronics producers use precious metals in electronics. Car manufacturers use platinum in cat...
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