An element A forms an oxide A2O5.

(a) What is the valency of element A?


(b) What will be the formula of chloride of A?

(a) Let the valency of element A be y, then 2y + 5(-2) = 0

So, y = valency of element A = 5


(b) As valency of element A is 5 and valency of chlorine is -1,


So, the formula of chloride of A is ACl5.


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