Discussion Forum



1)

The increasing of atomic radii of the following group 13 elements is


A) Al<Ga<In<Tl

B) Ga<Al<In<Tl

C) Al<In<Ga<Tl

D) Al<Ga<Tl<In

Answer:

Option B

Explanation:

Due to poor shielding of d-orbital in Ga, the atomic radius of Ga is smaller than that of Al. Thus, Ga< Al< In< TI