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F, Cl and Br are the elements each having seven valence electrons. Which of these (i) has the largest atomic radius, (ii) is most reactive? Justify your

answer stating reason for each.



(I) Br has largest atomic radius , as the atomic radius increases on moving down the group  in the periodic table.

(ii) F (fluorine) is the most reactive metal , as the reactivity of the element decreases on going down the group.

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