Chapter U1.20, Problem 1E

Interpretation Introduction

Interpretation:

The role of number of valence electrons used to predict the type of ionic compound formed needs to be determined.

Concept introduction:

Valence electrons actually participate in the chemical reaction. Valence electrons are removed to form cations. In case of anion formation, electrons are added into the valence shell to get nearest noble gas configuration.

Answer to Problem 1E

Valence electrons help to predict the type of compounds formed as it has role in ion formation.

Explanation of Solution

Iron, Fe can remove two or three electrons. When two electrons are removed it produces ferrous salt. But when three electrons are removed than ferric salt is produced. It is an example of variable valency. When sodium is considered it always removes one electron to produce sodium ion with single positive charge.

Conclusion

Thus, valence electrons are very important to predict the type of compound formation.