First slide

13th group or boron group

Question

The correct order of Ionization potential among the Boron group elements

Moderate

A

$B > G a > A l > T l > I n$
B

$B > T l > A l > G a > I n$
C

$B > T l > A l > G a = I n$
D

$B > T l > G a > A l > I n$

Solution

Tl & Ga have poor shielding effect of 4f & 3d-orbitals. So they have high Ionization potentials.

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