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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
Tasker, Roy – Teaching Science, 2014
Why is chemistry so difficult? A seminal paper by Johnstone (1982) offered an explanation for why science in general, and chemistry in particular, is so difficult to learn. He proposed that an expert in chemistry thinks at three levels; the macro (referred to as the observational level in this article), the sub-micro (referred to as the molecular…
Descriptors: Chemistry, Visualization, Molecular Structure, Theory Practice Relationship
Kelly, Resa M.; Jones, Loretta L. – Journal of Chemical Education, 2008
Animations of the particulate level of matter are widely available for use in chemistry classes and are often the primary means of representing molecular behavior. These animations may also be viewed by individual students using textbook Web sites, although without reinforcement or feedback. It is not known to what extent the material in these…
Descriptors: Chemistry, Animation, Science Instruction, Teaching Methods