Nickel is a hard, malleable, ferromagnetic metal that is highly polished and resistant to corrosion. The element symbol is
Ni. The periodic table has an atomic number of 28 and a relative atomic mass of 58.69. It is a group VIII metal. Density 8.9g/cm³, melting point 1455 °C, boiling point 2730℃. Nickel is a silver-white metal, in the air is easy to be oxidized by the air, the surface of the formation of some black oxide film, so people see nickel often color hair black. Nickel is hard, ductile, magnetic and corrosion-resistant, and highly polished. Nickel is also abundant in the earth's crust. In nature in the form of nickel silicate ore or sulfur, arsenic, nickel compounds. Nickel is often used in the manufacture of stainless steel, alloy structural steel and other steel fields, electroplating, high nickel base alloy and battery fields, widely used in aircraft, radar and other military manufacturing, civil machinery manufacturing and electroplating industry.
