Chapter 8, Problem 39A

Interpretation Introduction

Interpretation: If the given compound with $1240{}^{\text{o}}\text{C}$ melting point is likely to be ionic or molecular needs to be identified.

Concept Introduction: Ionic bonds are formed by the complete transfer of electron/s from a more electronegative atom to a less electronegative atom. The interaction between positive and negative charge is strong thus, ionic bonds are strong.

Explanation of Solution

Ionic compounds are formed an atom with low electronegativity donates its electron/s to an atom with high electronegativity. This complete transfer of electron/s results in the formation of an ionic bond. Molecular compounds are formed when two atoms share electron pair/s to form covalent bonds. The given compound has a melting point of $1240{}^{\text{o}}\text{C}$ . This is a very high temperature. Generally, ionic compounds have high melting and boiling points as compared to molecular compounds. This is because ionic bonds are stronger than covalent bonds. Thus, the given compound is likely to be an ionic compound.