Asmae Bouayad, Fatiha Kaddari, Mohammed Lachkar, Abdelrhani Elachqar
(Laboratory of Didactics, Pedagogy and Curricular Innovation, Sidi Mohamed Ben Abdellah University, Morroco)

 

 

Abstract: A student not mastering concepts and models related to the concept of chemical bond is not entitled to construct a coherent chemical and procedural knowledge. The objective of this work is to highlight the models that university students, at the beginning of the cycle of the license, associated with this concept and therefore how they represent it. For this, we asked a population of 79 students, studying Chemistry Material Sciences (MSC), to define the concept of chemical bond and two related concepts: the valence and the octet rule, after intense courses on these concepts. Analysis of obtained data showed that this concept is far from to be mastered. The most students remain in declarative knowledge and do not exceed the model of covalent bond. We also found several confusions and amalgams about this concept and those associated, such as octet rule and valence.

 

 

Key words: conception, chemical bond, valence, octet rule