Zinc is a Block D, Group 12, Period 4 element. The number of electrons in each of Zinc's shells is 2, 8, 18, 2, and its electronic configuration is [Ar] 3d10 4s2. In its elemental form zinc's CAS number is 7440-66-6. The zinc atom has a radius of 133.5.pm and it's Van der Waals radius? is 139.pm. Zinc is a bluish-white, lustrous metal. It is brittle at ordinary temperatures but malleable at 100 to 150 o C. It is a fair conductor of electricity, and burns in air at high red heat with evolution of white clouds of the oxide?. It has unusual electrical, thermal, optical, and solid-state properties that have not been fully investigated. The metal is employed to form numerous alloys with other metals. Brass, nickel, silver, commercial bronze, soft solder?, and aluminum? solder? are some of the more important alloys. Large quantities of zinc are used to produce die castings, which are used extensively by the automotive, electrical, and hardware industries. Zinc is also used extensively to galvanize other metals such as iron to prevent corrosion. Zinc oxide? is widely used in the manufacture of paints, rubber products, cosmetics, pharmaceuticals, floor coverings, plastics, printing inks, soap, storage batteries, textiles, electrical equipment, and other products. Zinc sulfide? is used in making luminous dials, X-ray and TV screens, and fluorescent lights The chloride? and chromate? are also important compounds. Zinc is available as metal and compounds with purities from 99% to 99.9999% (ACS grade to ultra-high purity); metals in the form of foil, sputtering target, and rod, and compounds as submicron and nanopowder. Zinc was first discovered byAndreas Marggraf? in 1746. The element name Zinc originates from the German word "zin" meaning tin?. American Elements (external link)

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