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Discovery VideosLyubov Hoffman Laroche, Gary Wulfsberg, Barbara Young The use of digital video for instruction has many advantages. In many situations the only way to present some chemical phenomena is through the use of video. The two video lessons presented here are examples intended to supplement our article in the August 2003 issue of JCE.
Descriptive Chemistry |
Periodicity / Periodic Table
Paramagnetism: Compounds Vials of a number of compounds (NaCl, MnSO4, FeSO4, CoCl2, NiSO4, ZnSO4, K4Fe(CN)6, [Co(NH3)6]Cl3, [Ni(NH3)6]Cl2, and H2O) are hung from a thread. When a magnet is brought near, some of the vials are attracted.
Magnetic Properties |
Atomic Properties / Structure
Paramagnetism: Oxidation States of Manganese Manganese(III) oxide, with 4 unpaired electrons per Mn atom, is more strongly attracted to a magnet than is manganese(IV) oxide, with only 3 unpaired electrons per Mn atom. Potassium permanganate, a compound of Mn(VII), has no unpaired electrons and is not attracted to a magnet.
Organometallic Chemistry: Development and Study of Catalytic ActivityCaroline R. Pharr and Shannon Stahl This Today's Science for Tomorrow's Scientists (TSTS) tutorial introduces current scientific research on the development and investigation of new catalysts for the selective oxidation of organic substances by molecular oxygen. Pharr, Caroline R.; Stahl, Shannon. J. Chem. Educ.2008, 85, 1453.
Catalysis |
Oxidation / Reduction |
Periodicity / Periodic Table |
Physical Properties |
Synthesis |
Transition Elements
The Return of the Black BoxMalka Yayon and Zahava Scherz In this activity, students make indirect observations of a sealed box containing different objects and try to deduce the properties and identities of the unseen contents. Yayon, Malka; Scherz, Zahava. J. Chem. Educ.2008, 85, 541.
Atomic Properties / Structure |
Nonmajor Courses
Periodic Table Target: A Game That Introduces the Biological Significance of Chemical Element PeriodicityRichard S. Sevcik, Ragan L. McGinty, Linda D. Schultz, and Susan V. Alexander Periodic Table Target, a game for middle or high school students that is constructed as a class project, familiarizes students with the periodic table, the periodicity of the elements, and their biological significance. Sevcik, Richard S.; McGinty, Ragan L.; Schultz, Linda D.; Alexander, Susan V. J. Chem. Educ.2008, 85, 516.
Make a Balloon Ec-Static In this activity, students create static electricity by rubbing a balloon on their hair or clothing. When you rub a balloon on hair, shirt, or sweater, the balloon will attract things toward it. The rubbing scrubs electrons off and they collect on the surface of the balloon. ,
Atomic Properties / Structure
Static Strength Tester In this activity, students make a static strength tester by suspending a Styrofoam ball from a string. When the ball is brought near static-charged balloon, it is repelled. How much it is repelled is a function of the static charge strength.
Atomic Properties / Structure
The Great Electron Rip-Off In this activity, students explore static electricity using transparent tape. When two pieces of tape are placed on a table top and then ripped up, they repel each other when brought close. This is because they lost electrons when they were pulled from the table. Since they have the same charge, they repel each other.
