Group 16 elements have a lower value of first ionization enthalpy as compared to group 15 elements. As group 15 elements have half filled p-orbital due to which group 15 have got extra stability.
Since group 15 elements have more stable nuclei ,therefore to remove electron from it will require more energy compared to group 16 elements. Thus , first ionisation enthalpy of group 15 will be higher than group 16 elements.
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Group 16 elements have a lower value of first ionization enthalpy as compared to group 15 elements. As group 15 elements have half filled p-orbital due to which group 15 have got extra stability.
Explanation:
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Since group 15 elements have more stable nuclei ,therefore to remove electron from it will require more energy compared to group 16 elements. Thus , first ionisation enthalpy of group 15 will be higher than group 16 elements.