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Iron Classification: Transition Metal Iron Periodic Table Location Group: 8 Period:4 Block: d Iron Electron Configuration: [Ar]3d64s2 Shell Structure: 2 8 14 2 Iron metal is widely alloyed with other metals and carbon for a multiple commercial uses. Iron is almost used in everything from constructions and railways to micro chip and cooking pans. The list of products of Iron is endless. Iron is the 4th most abundant element in the Earth's crust. The Earth's core is believed to be comprised mainly of iron. Iron is the active part of the hemoglobin molecule our bodies use to transport oxygen from the lungs to the rest of the body. Iron is an essential mineral for health, but too much iron is toxic. Iron in the blood reacts with peroxides that damage DNA, protein, lipids and other cellular components. Works Cited • "10 Facts About Iron." About. N.p., n.d. Web. 22 Oct. 2014. <http://chemistry.about.com/od/elementfacts/a/10Iron-Facts.htm>. • "Chemical Elements.com - Iron (Fe)." Chemical Elements.com - Iron (Fe). N.p., n.d. Web. 23 Oct. 2014. <http://www.chemicalelements.com/elements/fe.html>. • "Iron." - Element information, properties and uses. N.p., n.d. Web. 25 Oct. 2014. <http://www.rsc.org/periodic-table/element/26/iron>.