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Nickel is a chemical element with symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel belongs to the transition metals and is hard and ductile.
N 8185 (OTTO) Nickel, irregular particles, <20 mm, 99.95% Cas 7440-02-0 - used by certain manufacturers in Li-ion batteries. Ni(IV) remains a rare oxidation state of nickel and very few compounds are known to date.