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Questions
Elements of group 16 have lower ionization enthalpy values compared to those of group 15 elements. Explain why?
Give reason:
Group 16th elements have lower ionisation enthalpy compared to group 15th elements.
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Solution
Group 15 elements have extra stable, half-filled p-orbitals with outer electronic configuration (ns2 np3). Therefore, more amount of energy is required to remove an electron compared to that of the partially filled orbitals (ns2 np4) of group 16 elements of the corresponding period. Hence, elements of group 16 have lower ionization enthalpy values compared to those of group 15 elements.
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