1. Tardigrade
  2. Question
  3. Chemistry
  4. The sizes of the following species increase in the order

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. The sizes of the following species increase in the order

Classification of Elements and Periodicity in Properties

Solution:

$Mg^{2+}, Na^+, F^-$ are isoelectronic ions (having two filled orbitals), therefore, their size increase in the order : $Mg^{2+} < Na^+ < F^-$. AI belongs to the 3rd period and also does not carry any charge. Hence it has the largest size.
$\therefore $ Over all sizes increase in the order
$Mg^{2+} < Na^+ < F^- < Al$