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    F

    Fluorine

    Halogen

    Atomic Number: 9 • Atomic Mass: 18.9980 u • Period: 2 • Group: 17

    Electron Configuration: 1s² 2s² 2p⁵
    Phase: Gas
    Electronegativity: 3.98
    Oxygen (O)Neon (Ne)
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    Physical & Chemical Properties

    Physical Properties

    • •Pale yellow gas at standard conditions
    • •Low melting and boiling points
    • •Slightly heavier than air
    • •Poor solubility in water
    Melting Point

    53.53 K (-219.62 °C, -363.32 °F)

    Boiling Point

    85.03 K (-188.12 °C, -306.62 °F)

    Density

    0.001696 g/cm³

    Electronegativity

    3.98 (Pauling scale)

    Chemical Properties

    • •Most electronegative element
    • •Extremely reactive, reacts with nearly all elements
    • •Forms strong bonds with carbon
    • •Strong oxidizing agent

    Electron Configuration

    1s² 2s² 2p⁵

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