Which elements are halogens? check all that apply. chlorine (cl) oxygen (o) carbon (c) radon (rn) iodine (i) gallium (ga)

The correct answers are Chlorine(Cl), Iodine(I). The halogens chlorine and iodine both have one electron missing in the outermost shell. All the members of this group have similar properties. They react with metals to form salt like NaCl, BaCl. They are highly electronegative which means tendency to attract electron. Halogens have low melting and boiling points.

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