An element Z has a valency of 3. What is the formula of oxide of Z ?

An element Z has valency of 3. Write down the formula of its oxide?

An element has valency 3. Write the formula of its oxide.

An element X has a valency of 4 whereas another element Y has a valency of 1. What will be the formula of the compound formed between X and Y ?

An element E has a valency of 4. (i) What will be the formula of its chloride ? (ii) What will be the formula of its sulphide ?

An element X has a valency of 2. Write the simplest formula for : (a) bromide of the element (b) oxide the element

An element X shows a variable valency of 3 and 5. What are the formulae of the oxide formed by it?

An element X of valency 3 conbines with another element Y of valency 2. What will be the formula of the compound formed ?

An element Z forms an oxide ZO_(3) . (a) What is the valency of element Z ? (b) What will be the formula of fluoride of Z?

An element A has valencies equal to 3 and 5. It combines with another element B having valency equal to 2. What are formulae of the compounds thus formed ?