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An element X from group 2 of the period...

An element `X` from group 2 of the periodic table reacts with an element `Y` from group 17 to form a compound.
(a) What is the nature of the compound formed?
(b) Sate whether the compound formed will conduct electricity or not.
(c) Give the formula of the compoumd formed.
(d) What is the valency of element `X`?
(e) How many electrons are there in the outer most shell of an atom of element `Y`?

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