![]() And the farther they are from the righ side of the table, the weaker their electronegativity is, resulting in lower Chemical Reactivity. ![]() That is why as you go up a group Chemical Reactivity increases because it is easier for elements to gain electrons when they have high electronegativity. (b) Covalent radii of the elements are shown to scale. The atomic radius for the halogens increases down the group as n increases.
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