Chapter 11.1, Problem 11.1P

(a)

Interpretation Introduction

Interpretation:

The trends in the first ionization energy for the groups and periods of the elements have to be given.

Concept Introduction:

Ionization energy:

The amount of energy required to remove an electron from the atom is known ionization energy.  If the removed electron is first, then it will be first ionization energy, if the removed electron is second, then it will be second ionization energy.

For example,

  $\text{Na}\text{+}\text{Ionization}\text{energy}\stackrel{}{\to }{\text{Na}}^{\text{+}}\text{+}\text{e}$

(b)

Interpretation Introduction

Interpretation:

The first ionization energy for the groups of elements decreases from top to bottom reason for this has to be given.

Concept Introduction:

Refer part (a)