Back to Elements
    Rn

    Radon

    Noble Gas

    Atomic Number: 86 • Atomic Mass: 222.0000 u • Period: 6 • Group: 18

    Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶
    Phase: Gas
    Electronegativity: 2.2
    Astatine (At)Francium (Fr)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    Physical & Chemical Properties

    Physical Properties

    • •Colorless gas
    • •Radioactive
    • •Densest known gas at room temperature
    Melting Point

    202 K (-71.15 °C, -96.07 °F)

    Boiling Point

    211.5 K (-61.65 °C, -78.97 °F)

    Density

    0.00973 g/cm³

    Electronegativity

    2.2 (Pauling scale)

    Chemical Properties

    • •Generally inert
    • •Can form compounds with fluorine
    • •Soluble in water

    Electron Configuration

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

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