Question

$Al\&Ga$ have nearly the same constant radii because of

• A. Greater shielding effect of s electrons of Ga atoms
• B. Poor shielding effect of s electrons of Ga atoms
• C. Poor shielding effect of d electrons of Ga atoms
• D. Greater shielding effect of d electrons of Ga atoms

Answer 1

The correct option is C

Poor shielding effect of d electrons of Ga atoms

Poor shielding of d electrons leads to greater attraction of the valence electrons by the nucleus leading to comparable radii.