manganese

| Introduction | History | Other Periodic Tables | Back |

Symbol:

Mn

Atomic Number:

25

Relative Atomic Mass:

54.9380 g mol^-1

Natural Abundance in Lithosphere, hydrosphere and atmosphere:

0.09% (mass fraction)

Electron Configuration:

[Ar]3d⁵4s²

Oxidation States:

VII, VI, IV, III, II, 0, -I

Atomic Radius:

136.7pm

Covalent Radius:

118pm

Ionic Radius:

25pm (for +7 oxidation state)

83pm (for +2 oxidation state)

(Values are for high-spin complexes)

Melting Point:

1244°C

Density:

7.44 g cm^-3 (at 20°C)

First Ionisation Energy:

7.435 eV

Reduction Potential:

-1.185V

for Mn²⁺ + 2e^- a Mn_(s)

Electronegativity (Allred and Rochow):

1.6

Number of Natural Isotopes:

1

Mass Number of the Most Abundant Isotopes:

55 g mol^-1 a 100% abundance