Calculate the lattice energies of the hypothetical compounds NaCl2 and MgCl, assuming th...

Calculate the lattice energies of the hypothetical compounds NaCl₂ and MgCl, assuming that the Mg⁺ and Na⁺ ions and the Na²⁺ and Mg²⁺ ions have the same radii. How do these results explain the compounds that are found experimentally?

Use the following data in the calculation: Second ionization energies Na, 4562 kJ/mol; Mg,1451 J/mol; enthalpy of formation: NaCl, –411 kJ/mol;

MgCl2, –642 kJ/mol.