Suggested Exemplary Texts and Instructional Activities Based on the Analysis of the Historical and Philosophical Dimensions of Hybridization Concept in Chemistry Textbooks

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The hybridization concept was developed by Linus Pauling to explain the structure of simple molecules. Historically, this concept was developed for only simple chemical systems. However, it is widely applied to explain the structure of complex molecules, such as organic, organometallic and coordination compounds. Problems with hybridization are especially notable when the d orbitals are involved in bonding. The use of hybridization concept cannot answer complicated aspects of molecules, such as color, magnetic properties and bond angles. At the high school level presentation of hybridization concept as a general approach to explain the structure of the molecules causes students to overgeneralize this concept to explain the structure of all molecules. The aim of this study was to investigate how the historical and philosophical dimensions of hybridization concept were presented in chemistry textbooks and also to examine the ideas of teachers on this subject. Another purpose of this study was to explore whether or not alternative theories about hybridization were provided in textbooks and to identify whether or not teachers take the dimensions of hybridization into consideration when teaching this concept. This study involves three major steps. In the first step, in order to investigate how historical and philosophical dimensions of hybridization concept were presented in chemistry textbooks, four high school chemistry textbooks which are commonly in Turkey were analyzed through content analysis method by using a set of check lists. In the second step, interviews were performed with 21 chemistry high school teachers to investigate their ideas regarding the presentation of hybridization concept in textbooks. The results emerged from these two steps showed that chemistry textbooks did not include the historical and philosophical dimensions of hybridization concept. The information gathered from the interviews with the teachers indicated that they did not possess adequate knowledge about the historical and philosophical dimensions of hybridization concept and many of them believed that these dimensions were not necessary for high school level students. Considering the results obtained from these two steps, in the third step, exemplary texts and instructional activities that aim to teach the historical and philosophical dimensions of hybridization concept will be provided.


Keywords: Hybridization Concept, Chemistry Textbooks, Instructional Activities
Stream: Technology in Learning; Maths, Science and Technology Learning
Presentation Type: 30 minute Paper Presentation in English
Paper: A paper has not yet been submitted.


Yuksel Tufan

Associate Proffesor, Science Education, Gazi University
Ankara, Turkey

I am an Associate Professor at Gazi University located in Turkey. I am insterested in nature of science and philosophy and histroy of science.

Nusret Kavak

Asisstant Professor, Science Education, Gazi University
Ankara, Turkey

I am an Assistant Professor at Gazi University located in Turkey. I am interested in instructional models in chemistry education

Kevser Yesim Susam

Gazi University
Ankara, Turkey


Ref: L09P0730