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- Iron abstract "Iron is a chemical element with the symbol Fe (from Latin: ferrum) and atomic number 26. It is a metal in the first transition series. It is by mass the most common element on Earth, forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust. Iron's very common presence in rocky planets like Earth is due to its abundant production as a result of fusion in high-mass stars, wherein the production of nickel-56 (which decays to the most common isotope of iron) is the last nuclear fusion reaction that is exothermic. Therefore, radioactive nickel is the last element to be produced, before collapse of a supernova causes the explosion that abundantly scatters this precursor radionuclide into space.Like other group 8 elements, iron exists in a wide range of oxidation states, −2 to +6, although +2 and +3 are the most common. Elemental iron occurs in meteoroids and other low oxygen environments, but is reactive to oxygen and water. Fresh iron surfaces appear lustrous silvery-gray, but oxidize in normal air to give hydrated iron oxides, commonly known as rust. Unlike many other metals which form passivating oxide layers, iron oxides occupy more volume than iron metal, and thus iron oxides flake off and expose fresh surfaces for corrosion.Iron metal has been used since ancient times, though copper alloys, which have lower melting temperatures, were used first in history. Pure iron is soft (softer than aluminium), but is unobtainable by smelting. The material is significantly hardened and strengthened by impurities, such as carbon, from the smelting process. A certain proportion of carbon (between 0.002% and 2.1%) produces steel, which may be up to 1000 times harder than pure iron. Crude iron metal is produced in blast furnaces, where ore is reduced by coke to pig iron, which has a high carbon content. Further refinement with oxygen reduces the carbon content to the correct proportion to make steel. Steels and low carbon iron alloys along with other metals (alloy steels) are by far the most common metals in industrial use, due to their great range of desirable properties and the abundance of iron.Iron chemical compounds, which include ferrous and ferric compounds, have many uses. Iron oxide mixed with aluminium powder can be ignited to create a thermite reaction, used in welding and purifying ores. It forms binary compounds with the halogens and the chalcogens. Among its organometallic compounds is ferrocene, the first sandwich compound discovered.Iron plays an important role in biology, forming complexes with molecular oxygen in hemoglobin and myoglobin; these two compounds are common oxygen transport proteins in vertebrates. Iron is also the metal used at the active site of many important redox enzymes dealing with cellular respiration and oxidation and reduction in plants and animals.".
- Iron wikiPageExternalLink v=onepage&q&f=true.
- Iron wikiPageExternalLink ele026.html.
- Iron wikiPageExternalLink nucbin2.html.
- Iron wikiPageExternalLink 026.htm.
- Iron wikiPageExternalLink element.asp.
- Iron wikiPageExternalLink CIIE_iron_48kbps_tcm18-120046.mp3.
- Iron wikiPageID "14734".
- Iron wikiPageRevisionID "604735247".
- Iron caption "Fire diamond for powdered iron metal".
- Iron flammability "1".
- Iron hasPhotoCollection Iron.
- Iron health "0".
- Iron reactivity "1".
- Iron subject Category:Biology_and_pharmacology_of_chemical_elements.
- Iron subject Category:Building_materials.
- Iron subject Category:Chemical_elements.
- Iron subject Category:Cubic_minerals.
- Iron subject Category:Dietary_minerals.
- Iron subject Category:Ferromagnetic_materials.
- Iron subject Category:Iron.
- Iron subject Category:Pyrotechnic_fuels.
- Iron subject Category:Transition_metals.
- Iron comment "Iron is a chemical element with the symbol Fe (from Latin: ferrum) and atomic number 26. It is a metal in the first transition series. It is by mass the most common element on Earth, forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust.".
- Iron label "Eisen".
- Iron label "Fer".
- Iron label "Ferro".
- Iron label "Ferro".
- Iron label "Hierro".
- Iron label "IJzer (element)".
- Iron label "Iron".
- Iron label "Żelazo".
- Iron label "Железо".
- Iron label "حديد".
- Iron label "鉄".
- Iron label "铁".
- Iron sameAs Železo.
- Iron sameAs Eisen.
- Iron sameAs Σίδηρος.
- Iron sameAs Hierro.
- Iron sameAs Burdina.
- Iron sameAs Fer.
- Iron sameAs Besi.
- Iron sameAs Ferro.
- Iron sameAs 鉄.
- Iron sameAs 철.
- Iron sameAs IJzer_(element).
- Iron sameAs Żelazo.
- Iron sameAs Ferro.
- Iron sameAs m.025rw19.
- Iron sameAs Q677.
- Iron sameAs Q677.
- Iron wasDerivedFrom Iron?oldid=604735247.
- Iron isPrimaryTopicOf Iron.