e) The elements in Group 7 of the periodic table (known as the halogens) react with metals to form
ionic compounds in which the halide ion carries a charge of –1.
f) In Group 7, the further down the group an element is:
- the less reactive the element
- the higher its melting point and boiling point.
g) A more reactive halogen can displace a less reactive halogen from an aqueous solution of its salt.
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