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Halogen

usgb/ˈhælədʒən/Volume
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Chemical groupPlay
Halogen refers to a group in the periodic table, not a single element. SlideFluorine and iodine belong to the halogen group.
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Reactivity contextPlay
Halogen elements are highly reactive, often discussed in chemistry reactions. SlideThe reactivity of halogens decreases down the group.
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Common saltsPlay
Halogen elements combine with metals to form salts, like table salt. SlideSodium chloride is a salt formed with the halogen chlorine.