MCQ
Which of the following electronic configuration is associated with the biggest jump  between the second and third ionization energies?
  • A
    $1s^2 \,2s^2 \,2p^2$
  • B
    $1s^2 \,2s^2\, 2p^6\, 3s^1$
  • $1s^2 \,2s^2 \,2p^6 \,3s^2$
  • D
    $1s^2 \,2s^2 \,2p^1$

Answer

Correct option: C.
$1s^2 \,2s^2 \,2p^6 \,3s^2$
c
Let us consider the configurations of the given elements after the loss of $2$ electrons:-

A) $1 s\, 2 s$

B) $1 s ^2 \,2 s ^2 \,2 p$

C) $1 s^2\, 2 s^2 \,2 p^5$

D) $1 s ^2 \,2 s ^2 2 p^6$

From the options above we notice that the greatest energy will be involved for option $C$ as it has attained the noble gas configuration after the loss of $2$ electrons and removal of a $3$ electron will require a lot of energy.

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