Manganese is a chemical element in the periodic table that has the symbol Mn and atomic number 25.

Notable characteristics

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Manganese is a gray-white metal, resembling iron. It is a hard metal and is very brittle, fusible with difficulty, but easily oxidized. Manganese metal is ferromagnetic only after special treatment.

The most common oxidation states of manganese are +2, +3, +4, +6 and +7, though oxidation states from +1 to +7 are observed. Mn²⁺ often competes with Mg²⁺ in biological systems, and manganese compounds where manganese is in oxidation state +7 are powerful oxidizing agents.

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