The electronic configuration of the atoms of elements ‘X’ and ‘Y’ are  ${\text{1s}}^{\text{2}}{\text{2s}}^{\text{2}}{\text{2p}}^{\text{6}}{\text{3s}}^{\text{2}}$  and  ${\text{1s}}^{\text{2}}{\text{2s}}^{\text{2}}{\text{2p}}^{\text{6}}{\text{3s}}^{\text{2}}{\text{3p}}^{\text{5}}$  respectively 

i) Element X belongs to 3^rd period and II A Group.

ii) Element Y contains 5 valency electrons

iii) The elements ‘X’ and ‘Y’ belongs to same blocks of the periodic table.

iv) The molecular formula of the compound formed by the X and Y is  ${\text{XY}}_2$

The correct points :