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ICSE - X - Chemistry - Chemical Bonding - Ionic Compounds and Covalent Compounds

what are the factors that affect formation of an ionic bond. What is the difference between lattice energy and electronegativity. Are both correct answers?

Asked by kshhitij 25th February 2013, 12:23 PM
Answered by Expert


Factors Affecting IONIC Bond

(i).    Low I.E. Values
                Ionization Energy is the minimum amount of energy which is required to eject theelectron completely from the outermost shell of neutral gaseous atom so as to form a positive ion. Thus, smaller the I.E., easier is to remove the electron to form cation. Hence ionic bondis readily formed.  
(ii).    High E.A. Values
               The atom which gains the electron must possess strong tendency to accept the additional electrons. Halogens possess high electron affinity & thus show high tendency for ionic bonding. The elements of oxygen family also exhibit remarkable electron affinity & form ionic compounds but not so readily as halogens.

(iii).    High Lattice Energy
              The lattice energy is defined as the energy released when one mole of an ionic compound is formed from the gaseous ions. The higher the value of lattice energy of the resulting ionic compound, greater will be the ease of its formation.
Answered by Expert 25th February 2013, 6:20 PM

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