An element X has valency 2 while element Y has valency 2. Write formula of compound formed by X and Y
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Answer:
the formula will be XY because valency is same
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As element X valency is 2 and element Y valency is 2 so according to cross exchange method the formula of this compound will be XY2. This method says that when elements in a compound has different valencies then in writing its chemical formula, we exchange their valencies with one another.
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