An element X has valency 3 while the element Y has valency 2. Write the formula of the compound berween X and Y

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

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 has valency of 3. Write down 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 ?

Which element has a valency 1?

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

The valency of an element A is 3 and that of element B is 2. Write the formula of the compound formed by the combination of A and B.

The valency of an element A is 4. Write the formula of its oxide.

Noble gas elements has valency_____