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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

    History

    Manganese has been known since ancient times

    Historical Timeline

    Recognized as an element by Carl Wilhelm Scheele in 1774

    Isolated by Johan Gottlieb Gahn by reduction with carbon

    Used in glassmaking since ancient Egyptian and Roman times