NO. 025Transition

Mn

Manganese

Manganese is an important industrial metal used in steel production and is also essential for biological enzyme systems.

Crystal Structure

Body-centered cubic (bcc)

Atomic Mass54.94 u

Density7.21 g/cm³

Melting Point1519 K

Boiling Point2334 K

Atomic Radius127 pm

Electronegativity1.55

Ionization Energy717 kJ/mol

Electron Affinity0 kJ/mol

Bonding TypeMetallic

Oxidation States2, 4, 7

Acid/BaseBasic

ReactivityMedium

Electron Configuration

[Ar] 3d5 4s2

Discovered ByJohan Gottlieb Gahn

Year1774

Known Isotopes

Mn-55