Question

Valeny of an elemet x is 3.wrte the chmical odf its oxide

Answer 1

Given, element X has valency 3.Thevalency of oxide O is 2. On interchanging the valency, we get,Therefore the formula of its oxidewill be X2O3. Compound 'X' hasvalency 3 and 'O' has valency 2 .