Iron

Iron Metals

Iron is the most used of all the metals, including 95 % of all the metal tonnage produced worldwide. Thanks to the combination of low cost and high strength it is indispensable. Its applications go from food containers to family cars, from scredrivers to washing machines, from cargo ships to paper staples. Steel is the best known alloy of iron, and some of the forms that iron takes include: pig iron, cast iron, carbon steel, wrought iron, alloy steels, iron oxides.

Iron (Chemical Composition)
Atomic mass	55.85 g.mol -1
Electronegativity according to Pauling	1.8
Density	7.8 g.cm-3 at 20°C
Melting point	1536 °C
Boiling point	2861 °C
Vanderwaalsradius	0.126 nm
Ionic radius	0.076 nm (+2) ; 0.064 nm (+3)
Isotopes	8
Electronic shell	[ Ar ] 3d6 4s2
Energy of first ionisation	761 kJ.mol -1
Energy of second ionisation	1556.5 kJ.mol -1
Energy of third ionisation	2951 kJ.mol -1
Standard potential	- o.44 V (Fe2+/ Fe ) ; 0.77 V ( Fe3+/ Fe2+ )