Nickel is a chemical element with the symbol Ni and atomic number 28. It is a silvery-white metal with a slight golden tinge and is one of the four ferromagnetic elements that are naturally occurring, along with iron, cobalt, and gadolinium. Nickel is ductile and malleable, and it is resistant to corrosion and tarnish. It is widely used in a variety of applications, including the production of stainless steel, coins, batteries, and electronics. It is also used as a catalyst in various chemical reactions and as a coloring agent in ceramics and glass. Nickel is found in the Earth's crust and is extracted from ores such as pentlandite, garnierite, and limonite.

Nickel is a chemical element with the symbol Ni and atomic number 28. It is a silvery-white metal with a slight golden tinge and is one of the four ferromagnetic elements that are naturally occurring, along with iron, cobalt, and gadolinium. Nickel is ductile and malleable, and it is resistant to corrosion and tarnish. It is widely used in a variety of applications, including the production of stainless steel, coins, batteries, and electronics. It is also used as a catalyst in various chemical reactions and as a coloring agent in ceramics and glass. Nickel is found in the Earth's crust and is extracted from ores such as pentlandite, garnierite, and limonite.