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  • Solve this problem Which of the following orders of ionic radii is correctly represented ?

Which of the following orders of ionic radii is correctly represented ?

  • Option 1)

    H- > H+ > H

  • Option 2)

    Na+ > F- > O2-

  • Option 3)

    F- > O2- > Na+

  • Option 4)

    Al3+ > Mg2+ > N3-

 

Answers (1)

best_answer

Cations lose electrons and are smaller in size than the parent atom. whereas anions add electrons and are larger in size than the parent atom. Hence the order is H^{-}>H>H^{+}

For isoelectronic species, the ionic radii decreases with increase in atomic number, i.e., nuclear charge. Hence the correct orders are as given below:

O^{2-}>F^{-}>Na^{-}

N^{3-}>Mg^{2+}>Al^{3+}


Option 1)

H- > H+ > H

This option is correct.

Option 2)

Na+ > F- > O2-

This option is incorrect.

Option 3)

F- > O2- > Na+

This option is incorrect.

Option 4)

Al3+ > Mg2+ > N3-

This option is incorrect.

Posted by

divya.saini

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