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Which electronic configuration of an ele...

Which electronic configuration of an element has abnormally high difference between second and third ionization enthalpies ?

A

`1s^(2) , 2s^(2) 2p^(6) , 3s^(1)`

B

`1s^(2) , 2s^(2) 2p^(6) ,3s^(2) 3p^(1)`

C

`1s^(2) , 2s^(2) 2p^(6) , 3s^(2) 3p^(2)`

D

`1s^(2) , 2s^(2) 2p^(6) , 3s^(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
Since element (d) has two s- electrons in the the valence shell therefore its `Delta _(i) H_(3)` is much highest than its `Delta_(i) H_(2)` since the third electron has to be lost from the inert gas configuration,
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