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NEET2018ChemistryClassification of Elements and Periodicity in PropertiesActual

The correct order of atomic radii in group 13 elements is

Options

  1. AB < Ga < Al < Tl < In
  2. BB < Al < Ga < In < Tl
  3. CB < Al < In < Ga < Tl
  4. DB < Ga < Al < In < Tl

Correct answer

A. B < Ga < Al < Tl < In

Step-by-step solution

In group 13 , due to inert electron pair effect of Ga , the size order will be Al > Ga

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