Question

Three elements X, Y, Z having Atomic number 12, 8, 17. Then give chemical

formula of compound when X and Y combine, X and Z combine.​

Answer 1

Magnesium: 12 ( atomic number )
Oxygen: 8 ( atomic number )
Chlorine: 17 ( atomic number )
Chemical compound of X and Y = magnesium oxide : Mg + O2 = MgO
Chemical compound of X and Z =magnesium chloride: Mg + Cl = Mgcl2..
Here is your answer...