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Showing 1 to 15 of 49 results Save | Export
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Esselman, Brian J.; Block, Stephen B. – Journal of Chemical Education, 2019
The VSEPR model has well-established limitations in its ability to represent accurate molecular and electronic geometries of simple molecules, which can create a significant need for students to relearn structure and bonding concepts in organic chemistry. We present an alternate method for describing molecular geometries and electronic structures…
Descriptors: Science Instruction, College Science, Undergraduate Study, Scientific Concepts
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Kolonko, Erin M.; Kolonko, Kristopher J. – Journal of Chemical Education, 2019
Strategies for teaching NMR spectral interpretation in the undergraduate organic chemistry curriculum are often faculty-centered and can lead to student reliance on rote memorization and "guess and check" methods rather than critical-thinking skills for structure determination. This article describes a student-focused methodology for the…
Descriptors: Spectroscopy, Inquiry, Active Learning, Organic Chemistry
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Stowe, Ryan L.; Herrington, Deborah G.; McKay, Robert L.; Cooper, Melanie M. – Journal of Chemical Education, 2019
Widespread adoption of the Next Generation Science Standards (NGSS) has created a need to carefully consider how chemistry curricula should support students in understanding the world in terms of atomic/molecular behavior. We argue that Standards-aligned coursework should be "core-ideas centered" due to evidence that curricula embedded…
Descriptors: High School Students, Science Instruction, Chemistry, Standards
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Di Vincenzo, Antonella; Floriano, Michele A. – Journal of Chemical Education, 2019
An application for visualizing the aggregation of structureless atoms is presented. The application allows us to demonstrate on a qualitative basis, as well as by quantitatively monitoring the aggregate surface/volume ratio, that the enhanced reactivity of nanoparticles can be connected with their large specific surface. It is suggested that,…
Descriptors: Chemistry, Science Instruction, Molecular Structure, Scientific Principles
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Le, Christine M.; Morra, Barbora – Journal of Chemical Education, 2019
The tutorials of a second-year undergraduate organic chemistry course have been modified to include a retrosynthetic exercise in conjunction with a Molecule of the Week (MoW) challenge. In contrast to the original tutorial assignments in the course, which primarily focused on completing simple reaction roadmaps, the new tutorials place a heavier…
Descriptors: Organic Chemistry, Science Instruction, Teaching Methods, Molecular Structure
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Bain, Kinsey; Rodriguez, Jon-Marc G.; Towns, Marcy H. – Journal of Chemical Education, 2019
The themes discussed in this study relate to how students reason about the information encoded in rate constants, which is important for developing a deep understanding of chemical kinetics at the molecular level. This study is part of a larger project centered more generally on students' understanding and use of mathematics in chemical kinetics.…
Descriptors: Science Instruction, Teaching Methods, Molecular Structure, Scientific Concepts
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Minkiewicz, Piotr; Darewicz, Malgorzata; Iwaniak, Anna – Journal of Chemical Education, 2018
A simple equation to calculate the oxidation states (oxidation numbers) of individual atoms in molecules and ions may be introduced instead of rules associated with words alone. The equation includes two of three categories of bonds, classified as proposed by Goodstein: number of bonds with more electronegative atoms and number of bonds with less…
Descriptors: Science Instruction, Secondary School Science, High Schools, College Science
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Joseph, Ariana; Budden, Katherine; Cisek, Richard; Tokarz, Danielle – Journal of Chemical Education, 2018
In a university third-year instrumental chemistry laboratory students build a laser based polarimeter for determining light scattering with commercially available optical components used in modern optics research laboratories. During this laboratory experiment, students learn that solutions containing molecules which scatter light also influence…
Descriptors: Chemistry, Science Instruction, Undergraduate Students, Error Patterns
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Zdanovskaia, Maria A.; Schwarz, Cara E.; Habib, Asif D.; Hill, Nicholas J.; Esselman, Brian J. – Journal of Chemical Education, 2018
The use of computational molecular modeling to enhance the teaching of chemical concepts is becoming commonplace. Incorporation of this technique into the curriculum, however, typically requires financial investment. This reality poses a problem for institutions where funding and associated resources are scarce and has a potential negative impact…
Descriptors: Science Instruction, Molecular Structure, Teaching Methods, Community Colleges
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Nagaoka, Shin-ichi; Kokubo, Tatsunobu; Teramae, Hiroyuki; Nagashima?, Umpei – Journal of Chemical Education, 2018
At an advanced stage of learning quantum chemistry, undergraduate students usually encounter simple Hückel-molecular-orbital (HMO) theory, whose primitive approach gives very useful insight into the electronic structure of p-conjugated molecules. However, on one hand, computational HMO software, when programmed without using molecular symmetry,…
Descriptors: Visualization, Chemistry, Science Instruction, Molecular Structure
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Murphy, Kevin V.; Turney, Justin M.; Schaefer, Henry F., III. – Journal of Chemical Education, 2018
Preceding even the Hartree-Fock method, molecular integrals are the very foundation upon which quantum chemical molecular modeling depends. Discussions of molecular integrals are normally found only in advanced and technical texts or articles. The objective of the present article is to provide less experienced readers, or students in a…
Descriptors: Teaching Methods, Molecular Structure, Chemistry, Science Instruction
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Brom, Joseph M. – Journal of Chemical Education, 2018
Molecular orbital configurations give rise to electronic terms comprising corresponding electronic states. Electronic terms possess symmetry classifications, which are denoted by a term symbol, based on the symmetry properties of the electronic wave functions associated with the states. Using the methylene radical, and both planar and twisted…
Descriptors: Chemistry, Science Instruction, Molecular Structure, Classification
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de Cataldo, Riccardo; Griffith, Kaitlyn M.; Fogarty, Keir H. – Journal of Chemical Education, 2018
Introductory chemistry students encounter the concept of hybrid orbitals as a transition from atomic orbitals to molecular bonding. The principal purpose of learning hybridization in the undergraduate curriculum is to impart an understanding of the origins of molecular bonding and geometry. Physical models of both individual hybrid orbitals and…
Descriptors: Introductory Courses, Science Instruction, Visualization, Molecular Structure
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Fuson, Michael M. – Journal of Chemical Education, 2017
Laboratories studying the anisotropic rotational diffusion of bromobenzene using nuclear spin relaxation and molecular dynamics simulations are described. For many undergraduates, visualizing molecular motion is challenging. Undergraduates rarely encounter laboratories that directly assess molecular motion, and so the concept remains an…
Descriptors: College Science, Undergraduate Study, Chemistry, Science Instruction
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Paik, Seoung-Hey; Kim, Sungki; Kim, Kihyang – Journal of Chemical Education, 2017
The four representative models that define oxidation-reduction reactions are often used differently in different situations or contexts in chemistry textbooks. Although integrated models have been suggested to overcome the confusion caused by this, they have not been successful. We therefore aim to interpret the causes for difficulties in the…
Descriptors: Science Instruction, Models, Classification, Secondary School Science
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