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The atomic radius of gallium is less than that of aluminium. This is due to

Options

  1. AGreater shielding power of s-electrons of gallium atom
  2. Bpoor shielding power of s-electrons of gallium
  3. CPoor shielding power of d-electrons of gallium
  4. DGreater shielding power of d-electrons of gallium

Correct answer

C. Poor shielding power of d-electrons of gallium

Step-by-step solution

Due to poor shielding effect of d-electrons of gailium, it leads to increase in effective nuclear charge which inturn leads to decrease in the radius of gallium as compared to aluminium.

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