Chapter 3, Problem 3.80AP

(a)

Interpretation Introduction

Interpretation:

The type of bonding (ionic (or) covalent) in beryllium hydride $\left({\text{BeH}}_{\text{2}}\right)$ and beryllium chloride $\left({\text{BeCl}}_{\text{2}}\right)$ has to be given.

Concept Introduction:

Ionic bonds:  An ionic bond is formed by combination of a metal and a nonmetal.  Ionic bonds formed by the transfer of electrons from one element to other.

Example:  The bonds in $\text{KI}$ are ionic because potassium (a metal) combines with iodine (a nonmetal) to form potassium iodide.

Covalent bonds:  A covalent bond is formed by combination of two nonmetals (or) by combination of a nonmetal with a metalloid.  It is formed by sharing of electrons between two atoms.

Example:  The bonds in ${\text{H}}_{\text{2}}{\text{O}}_{\text{2}}$ are covalent because hydrogen and oxygen (both are nonmetals) combines to form hydrogen peroxide.

(b)

Interpretation Introduction

Interpretation:

The type of bonding (ionic (or) covalent) in sodium nitride $\left({\text{Na}}_{\text{3}}\text{N}\right)$ and ammonia $\left({\text{NH}}_{\text{3}}\right)$ has to be given.

Concept Introduction:

Refer to part (a).