The aim of this study was to identify the influence of chemistry textbooks in the process of teaching/learning of concepts, particularly chemical valence. For this, the form in which the concept is discussed was analyzed in several chemistry textbooks. Also, the influence of the texts was evaluated by applying a survey to a group of 40 students. It was observed that the concept of valence in the texts considered in his study the concept of valence is presented introduces students in incomplet...
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