Which of the following statements are correct?

From the Kossel and Lewis treatment of the formation of an ionic bond, it follows that the formation of ionic compounds would primarily depend uponThe ease of formation of the positive and negative ions from the respective neutral atoms. But it cannot explain. The arrangement of the positive and negative ions in the solid, that is, the lattice of the crystalline compound.M(g)⟶M+(g)+e-[removal of electron This involves ionization enthalpyX(g)+e-⟶X-(g)[ addition of electron ]This involves electron gain enthalpy.