Manganese

Transition metal · 54.93804 u · group 7, period 4

Manganese · Mn

Atomic number25

SymbolMn

CategoryTransition metal

Standard stateSolid

Group · Period · Block7 · 4 · d

Electron configuration[Ar]4s2 3d5

Atomic mass54.93804 u

Atomic radius197 pm

Protons / Neutrons / Electrons25 / 30 / 25

Shells (e⁻ per shell)2, 8, 13, 2

Electronegativity (Pauling)1.55

Ionization energy7.434 eV

Electron affinity—

Oxidation states+7, +4, +3, +2

Melting point1.52e+3 K · 1.25e+3 °C

Boiling point2.33e+3 K · 2.06e+3 °C

Density7.3 g/cm³

Year discovered1774

CPK color

#9C7AC7

State at room temp (25 °C)

solid

Position