Question

Valency of an element x is 3. Write the chemical formula of its oxide.

Answer 1

Al 203Compound 'X' has valency 3 and 'O' has valency 2 . L.C.M of 3 & 2 is 6 .
For X = 3 * 2 = 6
For O = 2 * 3 = 6
Therefore is the formula of oxide of '

Answer 2

Gud morning user!
Here's ur answer!
As per your question it can be Aluminium or Lithium.
So, it's chemical formula is Al2O3.
Al3+ ions + O2- ions.
By interchanging the ions Al2O3 will be formed.
Hope it'll helps!!