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Group 7 (halogens)
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The elements in Group 7 are all non-metals that have coloured vapours, most of which are toxic.
The state of the elements at room temperature changes from gas to solid, down Group 7.
Reactivity decreases down Group 7.
Halogens react with Group 1 and 2 metals to form metal halides.
Metal halides are soluble in water.