Chapter 7, Problem 78A

Interpretation Introduction

Interpretation:

The naming of ionic compound needs to be explained.

Concept introduction:

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 causes the ionic bond formation. Ionic compounds are formed only when there is a balance between their charges.

Answer to Problem 78A

The naming conventions are such that cations are named firstly and then anion in which the anion will be ending with ‘ide’. The subscripts are given for those having more than one ion.

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.

Anions are named ending with ‘ide’ and cations are named after the element.

The naming convention of ionic compounds is done based on guidelines

• Cations are named first and then anions
• Cations are named as metal while anions are ending with ‘ide’
• The number of cations and anions must be lowest possible.
• The subscripts are given for those having more than one ion, be it cation or anion.
• In case of polyatomic ion, the compound is named after the ion.
• Elements belonging to group 1 and 2 has one oxidation number while groups having metals and transition metals have more than one oxidation number.

Conclusion

The naming conventions are such that cations are named firstly and then anion in which the anion will be ending with ‘ide’. The subscripts are given for those having more than one ion.