Chapter 14, Problem 14.19P

(a)

Interpretation Introduction

Interpretation:

The magnitude melting point in group $\text{1A}\left(\text{1}\right)$ elements has to be explained.

Concept Introduction:

Melting point:

At what temperature the given slide melt into liquid is known as melting point, this melting point is increasing down to up in the periodic table.

(b)

Interpretation Introduction

Interpretation:

Trend of $\text{E-E}$ bond length of group $\text{1A}\left(\text{1}\right)$ elements has to be explained

Concept Introduction:

Bond length:

The distance between centres of the nucleus of atoms. In generally, bond length directly proportional, it is

  $\text{Bond length}\text{α}\text{Atomic}\text{size}$

(c)

Interpretation Introduction

Interpretation:

Trend of hardness group $\text{1A}\left(\text{1}\right)$ elements has to be explained

(d)

Interpretation Introduction

Interpretation:

Trend of molar volume group $\text{1A}\left(\text{1}\right)$ elements has to be explained

Concept Introduction:

Ionization energy:

Atomic radius:

The distance between the outer most electrons to centre of nucleus in an Atom is known as ionic radius.

(e)

Interpretation Introduction

Interpretation:

The magnitude of ${\text{ΔH}}_{\text{hydr}}$ of ${\text{E}}^{\text{+}}$ ion of group $\text{1A}\left(\text{1}\right)$ elements has to be explained

Concept Introduction:

Lattice energy:

The released energy, when the formation of crystalline compound from its ions is known as lattice energy.