Nickel

Nickel (nie), English name Nickel, as a transition metal element, element symbol Ni, located in the fourth cycle first Ⅷ, atomic number 28. Nickel is a silvery white metal, with good mechanical strength and ductility. Insoluble in water, acid and alkali corrosion resistance is very strong, but soluble in dilute nitric acid and aqua regia. Resistance to high temperature, melting point 1455 ° C, the boiling point of 2730 ° C. Density of 8.902 g/cm after. Can be used to make money, etc., on top of other metal plating can prevent rust.

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