write the chemical formula of the compound formed when a second group element y combines with a group 17 element x?
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Explanation:
An element X from Group 2 of the periodic table reacts with Y from Group 17 to from a compound give the formula of the compound....●
(c) Element X belongs to group 2 so its valency is 2. Element Y is from group 17 so its valency is 1 (18-17=1). So, one atom of X combines with two atoms of Y to give a compound of the formula XY2.
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