Short Note
An element X of valency 3 combines with another element Y of valency 2. What will be the formula of the compound formed ?
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Solution
Valency of element X = 3
Valency of element Y = 2
Elements : X Y
Valencies : 3 2
Formula for the compound formed between X and Y can be worked out by crossing the valencies of the constituent elements.
Therefore, formula of the compound is X2Y3.
Concept: Writing Chemical Formulae
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