Skip to content
New summer mock series is live Attempt timed papers for SSC, banking, and engineering entrances with updated syllabi for this season. View exams

Question

Which element in group 13 has the lowest third ionization enthalpy?

Options

Choose one · Correct answer highlighted

Explanation

Third ionization enthalpy decreases down group 13 as size increases, reducing nuclear attraction. Tl (period 6) has the lowest value among B, Al, Ga, and Tl.