Which of the following represents the correct sequence of electronegativity for the elements of Grou — p Block Elements Chemistry Question

💡 Solution & Explanation

The electronegativity of Group 13 elements first decreases from Boron to Aluminium, and then slightly increases down the group from Gallium to Thallium due to the poor shielding by inner d and f electrons. The correct order is B (2.0) > Tl (1.8) > In (1.7) > Ga (1.6) > Al (1.5).