Question

valency of an element is 3 write the chemical formula of its oxide

Answer 1

If X is the element having 3 valency then formula of its oxide is X2O3 ex Al2O3

Answer 2

Hey friend !!

Here is your answer.

Let the element with valency 3 be X.

So the chemical formula of its oxide will be :

==> X2O3

The valency of element X and oxygen gets crossed .So we X2O3 as answer.

Hope it helps.

#pragya_singh