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Direct linkNarapat Rattanapirun; Parames Laosinchai – Journal of Chemical Education, 2023
The main difficulty in studying molecular symmetry is the mental manipulation of molecules when searching for symmetry. Numerous methods of teaching molecular symmetry require students to identify symmetry elements of objects or molecules. As an alternative, we propose activity that identifies symmetry using elements outside the objects, together…
Descriptors: Chemistry, Molecular Structure, Scientific Concepts, Concept Formation
Download full textKapici, Hasan Özgür – International Journal of Research in Education and Science, 2023
Being able to move between different representations levels (macroscopic, submicroscopic, and symbolic) is important to understand a chemical phenomenon meaningfully. The current study investigated how pre-service science teachers moved from symbolic representation to sub-microscopic representation. A total of 205 pre-service science teachers,…
Descriptors: Science Instruction, Chemistry, Preservice Teachers, Science Teachers
Casas, Lluís; Estop, Euge`nia – Journal of Chemical Education, 2015
Both, virtual and printed 3D crystal models can help students and teachers deal with chemical education topics such as symmetry and point groups. In the present paper, two freely downloadable tools (interactive PDF files and a mobile app) are presented as examples of the application of 3D design to study point-symmetry. The use of 3D printing to…
Descriptors: Geometry, Models, Printing, Physical Sciences
Simpson, Scott; Lonie, David C.; Chen, Jiechen; Zurek, Eva – Journal of Chemical Education, 2013
A computational experiment that investigates single-walled carbon nanotubes (SWNTs) has been developed and employed in an upper-level undergraduate physical chemistry laboratory course. Computations were carried out to determine the electronic structure, radial breathing modes, and the influence of the nanotube's diameter on the…
Descriptors: Science Instruction, College Science, Chemistry, Computer Uses in Education
Sein, Lawrence T., Jr. – Journal of Chemical Education, 2010
A system for construction of simple poster-board models is described. The models dynamically demonstrate the symmetry operations of proper rotation, improper rotation, reflection, and inversion for the chemically important point groups D[subscript 3h], D[subscript 4h], D[subscript 5h], D[subscript 6h], T[subscript d], and O[subscript h]. The…
Descriptors: Science Instruction, Scientific Concepts, Science Laboratories, Teaching Methods
Smith, Carol L.; Wiser, Marianne; Anderson, Charles W.; Krajcik, Joseph – Measurement: Interdisciplinary Research and Perspectives, 2006
The purpose of this article is to suggest ways of using research on children's reasoning and learning to elaborate on existing national standards and to improve large-scale and classroom assessments. The authors suggest that "learning progressions"--descriptions of successively more sophisticated ways of reasoning within a content domain based on…
Descriptors: Student Evaluation, National Standards, Children, Scientific Concepts
