The chemical symbol for nickel is Ni. Nickel is a transition metal with an atomic number of 28 and is known for its corrosion resistance and high melting point. It is primarily used in the production of stainless steel and other alloys, and also finds application in battery production, particularly in rechargeable batteries. Nickel has significant industrial importance, contributing to various sectors including electronics, automotive, and aerospace. Its compounds are also utilized in various chemical processes and as catalysts, illustrating its versatility in both industrial and environmental contexts.