Considering that the students belonged to all chemistry programs (organic, physical or bio-chemistry) the syllabus relied much more on general and heuristic basic concepts and less on complex mathematical problem-solving. But the first part of the course, which is what this article is about, takes the infrequent approach of trying to define and understand what the bond is, starting with the premise that chemistry students deserve to be told the present state of affairs about the current scientific knowledge of the chemical bond, and the debates that are taking place. Even if the students already come with basic and practical knowledge of the existence and nature of the bond from previous courses, many of them receive this semi-philosophical methodology with surprise, but also with curiosity and interest.