When All You Have Is a Covalent Model of Bonding, Every Substance Is a Molecule: A Longitudinal Study of Student Enactment of Covalent and Ionic Bonding Models

When All You Have Is a Covalent Model of Bonding, Every Substance Is a Molecule: A Longitudinal Study of Student Enactment of Covalent and Ionic Bonding Models
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当你拥有的只是共价键合模型时,每种物质都是分子:对学生实施共价键合和离子键合模型的纵向研究

DOI:
10.1021/acs.jchemed.2c00188
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发表时间:
2022
影响因子:
3
通讯作者:
Lewis, Scott E.
Lewis, Scott E.
中科院分区:
化学2区
文献类型:
--
作者:
Bowe, Kathleen A.;Bauer, Christopher F.;Wang, Ying;Lewis, Scott E.

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这项纵向研究探讨了学生在两个不同的机构,以创造性的练习有关的化学键模型的反应。以创造性练习的形式提出的问题要求学生提供有关两种化合物的相关,准确和独特的陈述,他们只提供了分子式和电负性值:SCl2和CaCl2。学生们在普通化学课结束时、六个月后和一年后回答了这些问题。他们的反应进行了定性和定量分析,探索模式的应用结合的想法和变化随着时间的推移。这些数据揭示了共价键的概念在离子化合物中的广泛应用,无论学生是否将该物质确定为离子化合物,并且这在一年内是一致的。讨论了普通化学(及其他)中键合模型教学的意义。
This longitudinal study examines the responses of students at two different institutions to creative exercises related to models of chemical bonding. Questions in the form of creative exercises required students to provide relevant, accurate, and distinct statements about two compounds for which they were provided only the formula and electronegativity values: SCl2and CaCl2. Students responded to the questions at the end of general chemistry, six months later, and one year later. Their responses were analyzed qualitatively and quantitatively to explore patterns in application of bonding ideas and change over time. The data reveal extensive application of covalent bonding ideas to an ionic compound, regardless of whether a student identified the substance as ionic or not, and that this is consistent over a year out. Implications for instruction of bonding models in general chemistry (and beyond) are discussed.
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