Mn, or manganese, is a chemical element with the symbol Mn and atomic number 25. It is a transition metal known for its important role in steel production, where it enhances strength and durability. Manganese is also found in various minerals and is essential for human health, playing a key role in metabolism and bone formation. Manganese is typically obtained from minerals like pyrolusite and is used in various industrial applications, including batteries and fertilizers. In nature, it is often found in combination with other elements, and its compounds are used in pigments and ceramics.