Question

The correct order of ionization energy for the isoelectronic species among the following is:

• A.
  $K^{+}>C{l}^{-}$
• B.
  $Ne>F^{-}$
• C.
  $N{a}^{+}>O^{2-}$
• D.
  All of the above

Answer 1

The correct option is D

All of the above
Ionization energy increases with increase in effective nuclear charge.
Order of effective nuclear charge for the isoelectronic species is: $cation>neutral>anion$
Hence, all the options are correct.