Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R).Assertion (A) : Nitrogen has higher ionisation energy than oxygen Reason (R) : Nitrogen has half filled orbital.
Question
Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R).Assertion (A) : Nitrogen has higher ionisation energy than oxygen Reason (R) : Nitrogen has half filled orbital.
Solution
The Assertion (A) and Reason (R) are both correct statements, but the Reason (R) is not the correct explanation for Assertion (A).
Assertion (A): Nitrogen does indeed have a higher ionization energy than oxygen. Ionization energy is the energy required to remove an electron from an atom or ion. Nitrogen has a higher ionization energy because it has a stable half-filled p orbital, which makes it harder to remove an electron.
Reason (R): Nitrogen does have a half-filled orbital. This is a stable configuration, which makes it harder to remove an electron.
However, the Reason (R) is not the correct explanation for Assertion (A). The higher ionization energy of nitrogen compared to oxygen is not solely because nitrogen has a half-filled orbital. Oxygen also has a half-filled p orbital (in its ground state), but its ionization energy is lower than nitrogen's. The difference in ionization energy is due to the stability of nitrogen's half-filled p orbital and the electron-electron repulsion in oxygen's p orbital.
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