Manganese (Mn)

Manganese is a chemical element with symbol Mn and atomic number 25. It is not found as a free element in nature; it is often found in minerals in combination with iron.

Atomic Number

25

Atomic Mass

54.938 u

Category

transition metal

Phase

solid

Density

7.3 g/cm³

Electron Shells

2, 8, 13, 2

Atomic Structure

Protons: 25 • Electrons: 25 • Neutrons: Varies by isotope

Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵

Discovery

1774 • Carl Wilhelm Scheele, Johan Gottlieb Gahn