11th Class Chemistry The p-Block Elements-I

  • question_answer 32) How would you explain the lower atomic radius of \[Ga\]as compared to Al?


    Due to poor shielding of the valence electrons in \[Ga\] by the inner d-electrons, the effective nuclear charge is high in comparison to Al. As a result, the attractive force with which the valence electrons are attracted is high. This brings contraction in size and hence, atomic size of \[Ga\] is lower in comparison to Al.  

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