Explain electronegativity of group 13 elements.

1.	Explain electronegativity of group 13 elements.
Answer» Solution :Group 13 elements are more ELECTRONEGATIVE than the elements of group 1 and 2 . The electronegativity first decreases from BORON to aluminium and then increases MARGINALLY down the group because atomic size increase . After aluminium due to the imperfect shielding effect of the d and f electrons the force of attraction of the nucleus TOWARDS electrons increases hence electronegativity increases .

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