# Chapter 8 - Sections 8.1-8.9 - Exercises - Review Questions: 25a

The alkali metals have one valance electron and are among the most reactive metals because their electron configuration $(ns^{1})$ is one electron beyond a nobles gas configuration.

#### Work Step by Step

They readily react to lose $(ns^{1})$ electron obtaining a noble gas configuration. This explains why alkali metals tend to form +1 cations.

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.