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At room temperature, the halogens show all the states of matter.
Halogens are the non-metallic elements of the periodic table that belong to group number 17. Fluorine and chlorine are gaseous at room temperature, bromine exists as liquid, whereas iodine and astatine are solid in nature. The halogens are highly electronegative and reactive in nature.
States of matter defined the physical form in which a substance can exist. There are three states of matter: solid, liquid and gas. The solids have a fixed volume and shape, liquids have fixed volume but not a fixed shape. The gases neither have a fixed shape nor volume.
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