Nickel () is a metallic chemical element with the symbol Ni and atomic number 28. Characteristics Nickel is a silvery white metal that takes on a high polish. It belongs to the transition metals, and is hard and ductile. It occurs most usually in combination with sulfur and iron in pentlandite, with sulfur in millerite, with arsenic in the mineral nickeline, and with arsenic and sulfur in nickel glance.[LINK: http://periodic.lanl.gov/elements/28.html] Los Alamos National Laboratory – Nickel[LINK: http://www.npi.gov.au/database/substance-info/profiles/62.html] National Pollutant Inventory - Nickel and compounds Fact Sheet[LINK: http://www.nature.com/nature/journal/v419/n6903/abs/419132a.html] High nickel release from 1- and 2-euro coins (Nature Abstract) It is clear that in common with massive forms of

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