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  • Compare ionisation energy of N and N+.Option: 1 I.E of N > N+<stro

Compare ionisation energy of N and N+.

Option: 1

I.E of N > N+


Option: 2

I.E of N+ > N.


Option: 3

I.E of N+ = N


Option: 4

Can’t compare.


Answers (1)

best_answer

Comparison between different I.E. -

  • Comparison of different ionisation enthalpies of N and N+

Nitrogen has electronic configuration as 1s22s22p3. After IE1, nitrogen becomes N+ and has the electronic configuration as 1s22s22p2. Everytime some amount of energy has to supply to remove the electron. But the nuclear charge remains the same, thus removing the second and third electron from the atom becomes very difficult. Thus for any atom, multiple ionisation enthalpies follow the order given below:

IE3 > IE2 > IE1

-

Electronic configuration of N is 1s22s22p3 and electronic configuration of N+ is 1s22s22p2 having 7 and 6 electrons respectively.

So according to electronic configurations, N has greater value of I.E as because of half-filled stable p-orbital. 

But whenever there is comparison between same atom for I.E we do not consider electronic configuration.

For same atom, we have:
     I.E3 > I.E2 > I.E1. 

Therefore I.E of N+ is greater than I.E of N.  

Therefore, Option(2) is correct

Posted by

HARSH KANKARIA

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