Chapter 8, Problem 8.15QE

Interpretation Introduction

Interpretation:

The reason for greater first ionization energy of silicon than that of aluminium has to be determined with the help of effective nuclear charges.

Concept Introduction:

The energy that is needed to remove an electron from the isolated, neutral gaseous atom is known as ionization energy. It is represented by $I$. The energy required to remove the first electron from the neutral atom is called the first ionization energy, denoted by $I_1$. The energy required to remove the second electron from the monovalent anion is called the second ionization energy, denoted by $I_2$ and so on. Energy is always supplied to the atom so as to remove an electron from it so ionization energies have positive values.

The net positive charge that is experienced by the electrons present in the subshell of the atom is called the effective nuclear charge. It is represented by ${\text{Z}}_{\text{eff}}$.