NotesFAQContact Us
Collection
Advanced
Search Tips
Laws, Policies, & Programs
What Works Clearinghouse Rating
Showing 2,281 to 2,295 of 2,813 results Save | Export
Peer reviewed Peer reviewed
Young, Jay A.; Plumb, Robert C. – Journal of Chemical Education, 1972
Descriptors: Chemistry, Demonstrations (Educational), Instructional Materials, Laboratory Experiments
Peer reviewed Peer reviewed
Wintner, Claude E. – Journal of Chemical Education, 1983
The concept of two-dimensional chirality is used to enhance students' understanding of three-dimensional stereochemistry. This chirality is used as a key to teaching/understanding such concepts as enaniotropism, diastereotopism, pseudoasymmetry, retention/inversion of configuration, and stereochemical results of addition to double bonds. (JN)
Descriptors: Chemistry, College Science, Higher Education, Molecular Structure
Peer reviewed Peer reviewed
Pellegrin, Valdo – Journal of Chemical Education, 1983
Demonstrates nitrogen rule and formula for calculating number of rings plus double bonds of any common organic compound. Calculation of degree of unsaturation (DU) by an empirical formula using successive modifications to the molecular formula, mathematical calculation of DU, and demonstration of the Euler formula are considered. (JN)
Descriptors: Chemical Bonding, Chemical Reactions, Chemistry, College Science
Peer reviewed Peer reviewed
Shah, S. Sadiq; Henscheid, Leonard G. – Journal of Chemical Education, 1983
Describes an experiment which has helped physical chemistry students learn principles of absorption spectroscopy, the effect of solvent polarity on absorption spectra, and some micellar chemistry. Background information and experimental procedures are provided. (JN)
Descriptors: Chemical Reactions, Chemistry, College Science, Higher Education
Peer reviewed Peer reviewed
Alexander, John J., Ed. – Journal of Chemical Education, 1983
Acceptable answers are provided for two chemistry questions. The first question is related to the prediction of the appearance of non-first-order proton nuclear magnetic resonance (NMR) spectra. The second question is related to extraterrestrial kinetic theory of gases. (JN)
Descriptors: Chemistry, College Science, Higher Education, Kinetic Molecular Theory
Peer reviewed Peer reviewed
Kauffman, George B. – Journal of Chemical Education, 1983
Discusses evidence for the tetrahedral configuration of the carbon atom, indicating that three symmetrical configurations are theoretically possible for coordination number four. Includes table indicating that resolvability of compounds of type CR'R"R"'R"" is a necessary but not sufficient condition for proving tetrahedral…
Descriptors: Atomic Structure, Chemical Bonding, Chemistry, College Science
Peer reviewed Peer reviewed
Banister, Arthur J.; Smith, Nigel R. M. – Journal of Chemical Education, 1982
Briefly surveys the main structural types of sulfur-nitrogen compounds, and describes syntheses, suitable as undergraduate experiments, which illustrate four of the five types of cyclic species. Laboratory procedures, background information, and discussion of results for these experiments are provided. (Author/JN)
Descriptors: Chemistry, College Science, Higher Education, Laboratory Procedures
Peer reviewed Peer reviewed
Mickey, Charles D. – Journal of Chemical Education, 1980
Reviewed are experimental methods (diffraction, spectroscopic, and resonance methods) used to obtain the structural parameters of bond angles and bond lengths in molecules. The valence shell electron pair repulsion theory (VSEPR) is summarized and applied to several real molecules. (CS)
Descriptors: Chemistry, Instructional Materials, Models, Molecular Structure
Peer reviewed Peer reviewed
Harris, Frank W. – Journal of Chemical Education, 1981
Reviews the physical and chemical properties of polymers and the two major methods of polymer synthesis: addition (chain, chain-growth, or chain-reaction), and condensation (step-growth or step-reaction) polymerization. (JN)
Descriptors: Chemical Reactions, Chemistry, College Science, Coordination Compounds
Peer reviewed Peer reviewed
Bailar, John C., Jr. – Journal of Chemical Education, 1981
Describes developments in the stereochemistry of coordination compounds. Includes chemical structures and chemical reactions of selected compounds. (JN)
Descriptors: Chemical Bonding, Chemistry, College Science, Coordination Compounds
Peer reviewed Peer reviewed
Fox, Jeffrey L. – Chemical and Engineering News, 1979
Explains how using computers to generate images, to gather high-speed data, and to make better models has greatly improved x-ray crystallography results. (Author/GA)
Descriptors: Biochemistry, Chemical Bonding, Chemistry, Computer Graphics
Peer reviewed Peer reviewed
Cortel, Adolf – Journal of Chemical Education, 1998
A paramagnetic substance is attracted by a magnetic field with a force proportional to its magnetic susceptibility which is related to the number of unpaired electrons in the atoms. Data are used to establish oxidation states and bonding properties. Describes a simple setup to demonstrate the paramagnetism of common inorganic compounds. (DKM)
Descriptors: Chemical Bonding, Chemistry, Demonstrations (Science), Higher Education
Peer reviewed Peer reviewed
Mawby, Roger – School Science Review, 1988
Examines four processes involving homogeneous catalysis which highlight the contrast between the simplicity of the overall reaction and the complexity of the catalytic cycle. Describes how catalysts provide circuitous routes in which all energy barriers are relatively low rather than lowering the activation energy for a single step reaction.…
Descriptors: Chemical Reactions, Chemistry, College Science, Enzymes
Peer reviewed Peer reviewed
Montague, Michael J. – American Journal of Pharmaceutical Education, 1989
The biotechnology revolution is making contributions to the improvement of health care. Some of the biotechnology-based pharmaceuticals in the marketplace include human hormones, enzymes, enzyme inhibitors, vaccines, immunomodulators, growth factors, and monoclonal antibodies. Many new diagnostics will appear and be used by patients in their own…
Descriptors: DNA, Drug Therapy, Enzymes, Futures (of Society)
Peer reviewed Peer reviewed
Copolo, Cynthia F.; Hounshell, Paul B. – Journal of Science Education and Technology, 1995
Compares the effects of using two- and three-dimensional model representations of molecular structures on student learning of organic chemical structures. Reports that students using both three-dimensional computer models and ball-and-stick models scored higher on the three-dimensional retention test of isomeric identification but lower on a…
Descriptors: Computer Uses in Education, Educational Technology, Models, Molecular Structure
Pages: 1  |  ...  |  149  |  150  |  151  |  152  |  153  |  154  |  155  |  156  |  157  |  ...  |  188