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The ionization energy of nitrogen is more than that of oxygen because

Option: 1

Nitrogen has half filled p-orbitals

Option: 2

Nitrogen is left to the oxygen in the same period of the periodic table

Option: 3

Nitrogen contains less number of electrons

Option: 4

Nitrogen is less electronegative

Answers (1)


As we have learnt,

Half filled and fully filled orbital configurations have more stability and as a result have a greater value for their Ionisation energy.

Now, since N has a half filled p orbital configuration, its ionisation energy is greater than O.

Posted by

Deependra Verma

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