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    • Name given to elements in group 7

    Elements in this group are very unreactive

    Elements in this group are stored under oil as they are very reactive with air and water.

    Noble gases

    Number of protons = 16 Number of neutrons = 16 Number of electrons = 18

    Alkali metals

    Halogens

    Number of protons = 11 Number of neutrons = 12 Number of electrons = 10

    Number of protons = 4 Number of neutrons = 5 Number of electrons = 2

    Number of protons = 12 Number of neutrons = 12 Number of electrons = 12