Question

How does the fajan rule explain the formation of covalent bond?

Answer 1

Fajans' rule states that a compound with lowpositive charge, large cation and small anion has ionic bond where as a compound with high positive charge, small cation and large anion are covalently bonded. For high charge, small cation will have more polarizing power.

Answer 2

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Here is your answer

» For a given cation, covalent character Increases with increase in size of the anion

» For a given anion, covalent character increases with a decrease in the size of the cation

» Covalent character Increseas with increasing charge either on cation or an anion

» Covalent character is higher for compounds with cations with pseudo noble gas electronic configuration