why first ionisation energy of nitrogen is greater then first ionisation energy of oxygen?
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Answer:
because of electronegativity and its atomic size and of low ionisation enthalpy of oxy. electron 2 repulsion when electron is added to half filled orbital
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Explanation:
In ionisation energy nitrogen is greater than Oxygen. It is because the electron is added to already half filled orbital which result in electron electron repulsion . Therefore removal of electron is easy in Oxygen.As we can see that Nitrogen has half filled p orbitals which is relatively stable configuration as compared to 2p4 configuration of Oxygen atom so it is difficult to remove one electron from this stable configuration.
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