Group 16 elements have lower value of first ionisation enthalpy as compared to group 15 elements because

Options

A. Half-filled p-orbitals in group 15 elements are more stable.
B. Group 16 elements have smaller size than group 15 elements.
C. Group 16 elements contain double bond while group 15 elements have triple bond.
D. Group 16 elements have more number of electrons in p-orbitals.

Answer

A

Explanation

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 has got extra stability.