Question

the formula of magnesium oxide is MgO state the formula of barium nitrate and barium sulphate if barium belong to the same group of magnesium

Answer 1

We are given that Barium is of same grp as Mg

So, Valency will be 2+

So, Formula of Barium Sulphate is BaSO4
     And, of Barium Nitrate is Ba(NO3)2

Answer 2

It is provided that formula of magnesium oxide is MgO. This means that valency of Mg is 2.

It is alsoprovided that barium belongs to same group thus its valency will also be 2.

Clearly ,Barium Nitrate :-Ba(NO3)2

Barium Sulphate :-BaSO4