Manganese is a chemical element; it has the symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron. First isolated in the 1770s, manganese is a transition metal with many industrial alloy uses, particularly in stainless steels in which it improves strength, workability, and...
Atomic number
25
Symbol
Mn
Atomic mass
54.938043 u
Melting point
2271 °F
Boiling point
3564 °F
Density
7.20 g/cm³
Electron config.
[Ar] 3d⁵ 4s²
CAS number
7439-96-5
InChIKey
PWHULOQIROXLJO-UHFFFAOYSA-N
Discovered
1774
