Back to Elements
    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)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    Occurrence

    Fluorine is found in various natural sources, including minerals, rocks, and the Earth's crust.

    • 0.065% of Earth's crust
    • Not found free in nature due to high reactivity
    • Found in minerals such as fluorite, fluorapatite, and cryolite
    • Small amounts present in soil, water, and living organisms