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    Mn

    Manganese

    Transition Metal

    Atomic Number: 25 • Atomic Mass: 54.9380 u • Period: 4 • Group: 7

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵
    Phase: Solid
    Electronegativity: 1.55
    Chromium (Cr)Iron (Fe)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    Occurrence

    Manganese is found in various natural sources, including minerals, rocks, and the Earth's crust.

    • 12th most abundant element in Earth's crust (0.1%)
    • Never found as a free metal in nature
    • Main ore minerals include pyrolusite (MnO₂), psilomelane, and rhodochrosite
    • Oceanic nodules on the sea floor contain millions of tons of manganese
    • Present in many minerals, often associated with iron