Chapter 8.5, Problem 71SSC

Interpretation Introduction

Interpretation The three properties of covalent compounds in the solid phase need to be explained.

Concept introduction:

The sharing of electrons between bonded atoms forms the covalent bond. The electro negativity of bonded atoms determines the nature of chemical bonds.

Complete transfer of electrons forms ionic bond therefore there are complete positive and negative charge on bonded ions.

Answer to Problem 71SSC

Covalent compounds have low melting point, insulator and softin their solid phase.

Explanation of Solution

The sharing of electrons between bonded atoms forms the covalent bond. Covalent compounds have covalent bonds between bonded atoms. They can be polar or non-polar covalent compounds. Because of no charge on bonded atoms, covalent compounds are non-conductor of heat and electricity.

The covalent molecules have weak dispersion forces therefore, they are soft, and have low melting and boiling points.

Conclusion

Covalent compounds have low melting point, insulator and soft in their solid phase.