Which of the following electronic configurati | vedclass

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(D) sudden large jump between the values of second and third ionization energies of an element indicates that the element has two valence electrons in

Vedclass · Accepted Answer

$1s^2, 2s^2 2p^6, 3s^2$

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(D) sudden large jump between the values of second and third ionization energies of an element indicates that the element has two valence electrons in its outermost shell.For the configuration $1s^2, 2s^2 2p^6, 3s^2$,the element has $2$ electrons in the $3s$ orbital.After the removal of the first two electrons,the configuration becomes $1s^2, 2s^2 2p^6$,which is the stable noble gas configuration of $Ne$ (Neon).Since this configuration is highly stable,removing the third electron requires a significantly higher amount of energy,resulting in a large gap between the second and third ionization energies.

Which of the following electronic configurations represents a sudden large gap between the values of second and third ionisation energies of an element?

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