Chapter 7, Problem 76A

Interpretation Introduction

Interpretation:

The information required to write a correct chemical formula to represent an ionic compound needs to be explained.

Concept introduction:

Molecules are bound together by different types of bonds namely ionic and covalent. Ionic bonds are formed when there is complete transfer of electrons from one atom to another. These atoms either lose or gain electrons to become negatively or positively charged ions. The forces of attraction between these ions cause the ionic bond formation. Ionic compounds are formed only when there is a balance between their charges.

Answer to Problem 76A

The writing of chemical formula for ionic compounds depends on the ions and the charges of the metal and non metal elements.

Explanation of Solution

Ionic bonds involve the transfer of electrons from one atom to the other. The metal atoms, an electrons donor, loses electrons to form a positively charged ion while the non-metal atoms, electron acceptor, gains electrons to form negatively charged ions. During the process of donating or gaining electrons, the atoms follow octet rule to attain a stable noble gas configuration.

The formation of ionic compounds is possible only when metal ion combines with non metal ion. Moreover, their charges are also required to indicate on its electrical neutrality on combination. Using these concepts, we can write chemical formula appropriately.

Conclusion

The writing of chemical formula for ionic compounds depends on the ions and the charges of the metal and non metal elements.