Question

What are the various factors due to which the ionization enthalpy of the maingroup elements tends to decrease down a group?​

Answer 1

Within the main group elements, the ionization enthalpy decreases regularly as we move down the group due to the following two factors: (i) Atomic size: As we move down the group, the atomic size of the atom regularly increases due to the addition of one new principal energy shell at each succeeding element....