# How does atomic structure affect chemical reactions?

The electronic configuration of the valance electron in Sodium is $3 {s}^{1}$ This lone electron achieves stability by moving away from the Sodium nucleus to another nucleus with a high electron negativity. The electron configuration of the valance electrons in Chlorine is $3 {s}^{2} 3 {p}^{5}$. The electrons in this atom achieve stability by attracting another electron to fill the third electron shell.