Question

Which element needs high ionization energy(IE 1),nitrogen or oxygen?

Answer 1

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❇Well, nitrogen atom has a first ionization energy of 14.53 eV , so it would be (b) .

✔ Since oxygen atom has a paired electron, it repels the other 2p electrons, which makes it easier to remove the first electron from oxygen atom.

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Answer 2

Answer:

The answer is nitrogen as it is half filled and requires more ionization energy to add an electron to it but it requires less ionization energy to add an electron to oxygen.

Note: The elements with full or half filled orbitals require high ionization energy.

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