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

(a) Elements of group 16 generally show lower value of first ionisation enthalpy as compared to the corresponding periods of group 15 . Why ? (b) H_2 S is less than acidic than H_2 Te . Why ?

Which group of elements shows lowest ionisation enthalpy?

The hydribes of group 15 elements act as :

Which elements have low ionisation enthalpy as compare to their neighbour element in first transition series?

Which of the element is expected to have lowest first ionisation enthalpy

The valency of group 16 elements 2 .