Chapter 2, Problem 2.36P

(a)

Interpretation Introduction

Interpretation: The position of maxima and minima for third ionization energy from first 12 atomic number should be determined.

Concept introduction: The ionization energy represented by IE is amount of energy that is needed to remove outer most valence electrons from the isolated neutral gaseous atom.

  $\text{A}\to {\text{A}}^{+}+1e^{-}$

(b)

Interpretation Introduction

Interpretation: The comparison of third ionization energy curve against number of electrons in reactant with given curves should be explained.

Concept introduction: Electron affinity is defined as amount of energy that is required to remove one electron from negative ion.

  ${\text{A}}^{-}\left(g\right)\to \text{A}\left(g\right)+{\text{e}}^{-}$

Here electron affinity is positive thus reaction is endothermic in nature.