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    Rf

    Rutherfordium

    Transition Metal

    Atomic Number: 104 • Atomic Mass: 267.0000 u • Period: 7 • Group: 4

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 6d²
    Phase: Solid
    Electronegativity: 1.3
    Lawrencium (Lr)Dubnium (Db)
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    Physical & Chemical Properties

    Physical Properties

    • •Expected to be a dense metal
    • •All isotopes are synthetic
    • •Extremely radioactive
    Melting Point

    2100 K (1826.85 °C, 3320.33 °F)

    Boiling Point

    5800 K (5526.85 °C, 9980.33 °F)

    Density

    23 g/cm³

    Electronegativity

    1.3 (Pauling scale)

    Chemical Properties

    • •Expected to behave like zirconium and hafnium
    • •Forms +4 oxidation state
    • •Limited studies due to short half-life

    Electron Configuration

    1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 6d²

    Electron configuration describes how electrons are distributed in atomic orbitals, showing how they are arranged in energy levels and subshells.