The factors affecting the electronegativity of elements are:
Atomic size
Type of hybridisation
Charge on the ion
All of the above
The electronegativity of any element depends upon the following factors:
(i) Atomic size: Smaller the size of an atom, greater is the electronegativity.
(ii) Type of hybridisation: The electronegativity increases with the increase in s-character in the orbitals.
(iii) Charge on ion: The cation always has a greater electronegativity than the anion. More the positive charge more is electronegativity.
Therefore, Option(4) is correct
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