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ORTAÖĞRETİM ÖĞRENCİLERİNİN KOVALENT BAĞDA ELEKTRONLARIN KONUM VE HAREKETLERİNİ ANLAMA BİÇİMLERİ

SECONDARY STUDENTS' UNDERSTANDING OF POSITION AND MOVEMENT OF ELECTRONS ON COVALENT BONDING

Journal Name:

  • Marmara Üniversitesi Eğitim Bilimleri Dergisi

Publication Year:

  • 2006

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
Students need to understand the position and movement of electrons in the outer shell so as to be able to conceptualize the formation of chemical bonding. This study designed in the line of constructivist view of knowledge and aimed to find out the ways in which Turkish students think about the position and movement of electrons in the formation of covalent bonding after receiving the conventional teaching. Four open-ended probes were designed and these formed the questionnaire that acts as the assessment tool of the study. The questionnaire was distributed to 11th grade science students (n= 293). They completed the questionnaire right after their conventional teaching on chemical bonding. Probes asked for explanations about the motion and position of electrons in covalent bonding. Findings indicated that most of the students could not indicate the position of electrons in the covalent bonding in the correct way and have mental models regarding the motion of shared electrons that are not in accordance with the scientific ones. Findings also showed that only the half of the students provided scientific explanations in defining the concepts of polar covalent bonding and electron-pair.
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Abstract (Original Language): 
Kimyasal bağların oluşum sürecini anlayabilmesi için, öğrencilerin atomun son yörünge elektronlarının konum ve hareketlerini kavraması gerekmektedir. Nitekim, kimyasal bağın oluşup oluşmayacağının ve hangi tür bağın oluşacağının belirleyicisi son yörünge elektronlarıdır. Oluşturmacı (constructivist) öğrenme anlayışının yön verdiği bu araştırmada, müfredatın öngördüğü kimyasal bağlarla ilgili öğretimi almış öğrencilerin kimyasal bağın oluşumu sırasında elektronların konum ve hareketini hakkındaki düşüncelerinin belirlenmesi amaçlanmıştır. Araştırmada tarama modeli kullanılmış, veri toplama aracı olarak ise açık uçlu sorulardan oluşan bir anket tasarlanmıştır. Anket ortaöğretim 11. sınıf sayısal bölümü öğrencilerine (n= 293) uygulanmıştır. Sorularda öğrencilerden kovalent bağın oluşumu sırasında elektronların pozisyon ve hareketlerini açıklamaları istenmiştir. Araştırmadan elde edilen bulgular, öğrencilerin büyük bölümünün kovalent bağı oluşturan elektronları doğru konumlandıramadıkları ve hareketine ilişkin bilimsel modeller ile uyumlu olmayan zihinsel modellere sahip olduklarını ortaya koymuştur. Araştırma bulgularından çıkan diğer bir sonuç ise, öğrencilerin yarıya yakın bir bölümünün polar kovalent bağ ve elektron çifti kavramlarını açıklarken elektronların konum ve hareketlerini doğru kullanamadıklarıdır.
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