What are the factors favoring ionic bond?

Answer 1

1.Ionization Enthalpy (Energy):Lesser the value of ionization enthalpy, greater the tendency of the atom to form cation. For example, alkali metals form cations easily because of the low value of ionization energies. 2. Electron gain enthalpy: Greater the value of electron gain enthalpy, more the tendency of the atom to form anion .For example,halogens have high electron gainenthalpies within the respective periods and form ionic compounds easily . 3. Lattice enthalpy: It is the energy released when the close packing of the gaseous ions of the opposite charge forms one mole of ionic solid. Magnitude of lattice energy gives an idea about the inter-ionic forces and it also gives the measure of the stability of the ionic compound which depends upon the following factors. 4. Size of the ions-Smaller the size of the ion s, lesser the inter nuclear distance and greater the inter ionic interaction, hence,larger the magnitude of lattice energy 5.Charge on the ions--- Larger the magnitude of the charge on the ions greater will be the attractive forces and higher the negative value of lattice energy.