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    H

    Hydrogen

    Nonmetal

    Atomic Number: 1 • Atomic Mass: 1.0080 u • Period: 1 • Group: 1

    Electron Configuration: 1s¹
    Phase: Gas
    Electronegativity: 2.2
    Helium (He)
    OverviewPropertiesAtomic StructureOccurrenceApplicationsHistory

    Occurrence

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

    • Most abundant element in the universe (75% by mass)
    • Present in water and all organic compounds
    • Occurs naturally on Earth primarily in compounds
    • Found in stars, including the Sun