Chapter 7, Problem 132A

Interpretation Introduction

Interpretation:

The anions and cations listed in the given table needs to be determined.

Concept introduction:

Metals always forms cation while non-metals form anions. To designate an anion an −ide added to the suffix of the element.

Answer to Problem 132A

The anions present in the table are: ${\text{Cl}}^{-},{\text{SO}}_4{}^{2-},{\text{CO}}_3{}^{-},{\text{Br}}^{-},{\text{BO}}_3{}^{3-},{\text{SiO}}_3{}^{2-}\text{and}{\text{F}}^{-}$.

The cations present in the table are: ${\text{Na}}^{\text{+}}\text{,}{\text{Mg}}^{\text{2+}}\text{,}{\text{Ca}}^{\text{2+}}\text{,}{\text{K}}^{\text{+}}\text{,}\text{and}{\text{Sr}}^{\text{2+}}$.

Explanation of Solution

A positive ion is formed when an atom loses one or more outer shell electrons and form stable noble gas configuration. In this table, the element which has a positive charge they are cations. A negative ion is formed when an atom gain electrons to form a noble gas configuration. In this table, element which have negative charge they are anions.

Conclusion

Cations are positively charged species while anions are negatively charged species.