Chapter 4, Problem 4.56QP

Interpretation Introduction

Interpretation:

From the given graph of ionization energy the group numbers of each element A, B and C should be determined.

Concept introduction:

• Ionization energy (IE) is the energy required to remove an electron from an isolated gaseous atom in its ground state.

$\text{Atom}{}_{\text{(g)}}\text{+}\text{IE}\to \text{positive}\text{ion}\text{(g)}\text{+electron}$

• The energy required to remove core electron is much greater than the energy required to remove valence electrons. Therefore,

$\text{First}\text{IE}\text{<}\text{Second}\text{IE}\text{<}\text{Third}\text{IE}$

•  The number of valence electrons in $\text{Group 2A}$ and $2$  is two, in $\text{group 3A}$ and $\text{3}$  there are three valance electrons and in $\text{group 1A}$ and $\text{group 1}$ one electron is present.

To determine: the group number of the given elements from the given graph of ionization energies.