Question

Q.13. Which of the following has greater atomic radii- Aluminium or Gallium and why?​

Answer 1

$\text{Answer:}$

Gallium has smaller atomic radius than aluminium because the d orbital which is highly diffused offers poor shielding effect which results in increased nuclear charge. Due to increased charge by nucleus, outer electrons get attracted, decreasing the radius.

$\\ \\ \\ \sf \colorbox{gold} {\red(ANSWER ᵇʸ ⁿᵃʷᵃᵇ⁰⁰⁰⁸}$

Answer 2

Answer:

Gallium has smaller atomic radius than aluminium

Reason:

"because the d orbital which is highly diffused offers poor shielding effect which results in increased nuclear charge. Due to increased charge by nucleus, outer electrons get attracted, decreasing the radius."That's why aluminium is greater radius.