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Parkin, Gerard – Journal of Chemical Education, 2019
Many compounds can be represented well in terms of the two-center-two-electron (2c-2e) bond model. However, it is well-known that this approach has limitations; for example, certain compounds require the use of three-center-two-electron (3c-2e) bonds to provide an adequate description of the bonding. Although a classic example of a compound that…
Descriptors: Inorganic Chemistry, Molecular Structure, Molecular Biology, Identification
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Ivanov, Dragia; Nikolov, Stefan – Physics Education, 2019
In this article we consider a well-known simple, very accessible demonstration of surface tension with a small boat propelled by substances that change the surface tension of water. A simple quantitative evaluation is provided that matches well with experimental data. A modification to the experiment is proposed allowing it to continue for a long…
Descriptors: Science Instruction, Physics, Science Experiments, Molecular Structure
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Sanders, Wesley C.; Johnson, Glen; Valcarce, Ron; Iles, Peter; Fourt, Hunter; Drystan, Kyne; Edwards, Dakota; Vernon, Jarom; Ashworth, Spencer; Barucija, Amar; Curtis, Zachary – Journal of Chemical Education, 2019
A new experiment for use in introductory nanotechnology courses is described. This experiment allows students to fabricate metallic wires with microscale lateral dimensions and nanoscale vertical dimensions. Fabrication occurs in the capillaries of polydimethylsiloxane (PDMS) stamps modified with hydrophilic polymers. This experiment provides…
Descriptors: Introductory Courses, Molecular Structure, Technology, Laboratory Experiments
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Brandon J. Yik; David G. Schreurs; Jeffrey R. Raker – Journal of Chemical Education, 2023
Acid-base chemistry, and in particular the Lewis acid-base model, is foundational to understanding mechanistic ideas. This is due to the similarity in language chemists use to describe Lewis acid-base reactions and nucleophile-electrophile interactions. The development of artificial intelligence and machine learning technologies has led to the…
Descriptors: Educational Technology, Formative Evaluation, Molecular Structure, Models
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Ruiz, Gabriella N.; Johnstone, Timothy C. – Journal of Chemical Education, 2020
Molecular symmetry plays an important role in many areas of chemistry, and students are generally taught to identify intramolecular symmetries at the undergraduate level. Intermolecular symmetry, the symmetry among groups of molecules, is of great importance in topics such as X-ray crystallography, but it receives substantially less attention.…
Descriptors: Chemistry, Molecular Structure, Science Instruction, Teaching Methods
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Lisensky, George; McFarland-Porter, Ross; Paquin, Weltha; Liu, Kangying – Journal of Chemical Education, 2020
Nanoparticle Zn[subscript 2x] Cu[subscript 1-x] In[subscript 1-x] S[subscript 2] is a promising and safer alternative to lead- and cadmium-containing quantum dots. Students prepare Zn[subscript 0.44] Cu[subscript 0.78] In[subscript 0.78] S[subscript 2] quantum dots in a one-pot synthesis without an inert atmosphere and investigate how the color,…
Descriptors: Science Instruction, Chemistry, Metallurgy, Molecular Structure
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Lisensky, George; Dauzvardis, Fabian; Luo, Jiaqi; Horger, Jacob; Koenig, Emma – Journal of Chemical Education, 2020
Polymers and nanochemistry are important facets of chemistry. In this experiment, students synthesize monodispersed poly(methyl methacrylate) nanospheres from the addition or chain polymerization of a rapidly stirred aqueous mini-emulsion of methyl methacrylate. The 2,2'-azobis(2-methylpropionamidine) dihydrochloride serves as a heat activated,…
Descriptors: Science Instruction, Chemistry, Scientific Concepts, Molecular Structure
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Mathayas, Nitasha; Brown, David E.; Lindgren, Robb – Journal of Research in Science Teaching, 2021
Constructing causal mechanistic explanations of observable phenomena is a key science practice that is often challenging for students as most mechanisms involve interactions of unobservable entities and activities. In this study, we examined how gesturing with a computer simulation that depicts the molecular mechanism of thermal conduction…
Descriptors: Computer Simulation, Nonverbal Communication, Middle School Students, Cues
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Shetranjiwalla, Shegufa; Leach, Nicole; Van Belle, Lori; Kingdon, Kassidy – Journal of Chemical Education, 2021
Is the reductionist approach to teaching chemical principles in the laboratory adequate for students to make effective evaluations? In this work, using the example of sunscreens, students first assessed the analytical chemistry parameters of the active ingredients, later comparing and contrasting them with organic chemistry information for…
Descriptors: Science Instruction, Scientific Principles, Science Laboratories, Organic Chemistry
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Galbraith, John Morrison; Shaik, Sason; Danovich, David; Brai¨da, Benoît; Wu, Wei; Hiberty, Philippe; Cooper, David L.; Karadakov, Peter B.; Dunning, Thom H., Jr. – Journal of Chemical Education, 2021
Introductory chemistry textbooks often present valence bond (VB) theory as useful, but incorrect and inferior to molecular orbital (MO) theory, citing the electronic structure of O[subscript 2] and electron delocalization as evidence. Even texts that initially present the two theories on equal footing use language that biases students toward the…
Descriptors: Science Instruction, Chemistry, Introductory Courses, Textbook Content
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Trinh, Emily H.; Wolff, Anna M.; Naumiec, Gregory R. – Journal of Chemical Education, 2021
Nuclear magnetic resonance (NMR) spectroscopy is the tool of choice for organic chemists to determine the molecular structure of organic molecules and, as a result, is a fundamental topic in the organic chemistry curriculum. A novel laboratory module has been developed to expand the scope of NMR spectroscopy beyond structure validation at the…
Descriptors: Undergraduate Students, Teaching Methods, Spectroscopy, Organic Chemistry
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Peikos, George; Spyrtou, Anna; Pnevmatikos, Dimitris; Papadopoulou, Penelope – Research in Science & Technological Education, 2023
Background: It is stated that it is necessary that students develop their nanoliteracy in order to come up with everyday issues arising from Nanoscale Science and Technology (NST) applications, taking informed decisions and estimating the potential risks and benefits. Even though the inclusion of NST in compulsory education is supported by many…
Descriptors: Science Education, Technology Education, Scientific Concepts, Scientific Attitudes
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Muljana, Pauline Salim; Selco, Jodye I. – Journal of Interactive Media in Education, 2023
Students perceive molecular bonding as an abstract concept; therefore, learning this concept seems uninteresting and difficult. A strategically designed learning object (LO), such as in the form of a simulation, can be used to help students acquire accurate mental images and build appropriate schema in addition to providing a concrete learning…
Descriptors: Teaching Methods, Student Attitudes, Simulation, Schemata (Cognition)
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Talbot, Christopher – School Science Review, 2022
An introduction to the noble gases and chemical bonding via Lewis theory and the octet rule are common inclusions in secondary school curricula. However, the usual approach may lead to misconceptions and difficulties when valence bond (VB) theory and valence shell electron pair repulsion (VSEPR) theory are taught at a later pre-university stage.…
Descriptors: Science Instruction, Molecular Structure, Chemistry, High School Students
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Hegde, Ashok N.; Smith, Spencer G. – Learning & Memory, 2019
Formation of long-term synaptic plasticity that underlies long-term memory requires new protein synthesis. Years of research has elucidated some of the transcriptional and translational mechanisms that contribute to the production of new proteins. Early research on transcription focused on the transcription factor cAMP-responsive element binding…
Descriptors: Memory, Brain Hemisphere Functions, Biochemistry, Molecular Structure
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