Back to Elements
    Md

    Mendelevium

    Actinide

    Atomic Number: 101 • Atomic Mass: 258.0000 u • Period: 7 • Group: 102

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹³
    Phase: Solid
    Electronegativity: 1.3
    Fermium (Fm)Nobelium (No)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    History

    Mendelevium has been known since ancient times

    Historical Timeline

    First element to be produced one atom at a time