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Plastic Sulfur Yellow powdered sulfur is heated until it becomes molten and brown. At first it flows freely, but then it becomes very viscous. Upon further heating, the viscous sulfur flows freely again and ignites. The burning liquid sulfur is poured into a beaker of water. When removed from the water, the sulfur is rubbery and flexible.
Gases : IDGasFromVelocity (8 Variations)
The following are graphs of molecular velocities versus the relative number of molecules for argon, chlorine, methane and xenon at 300K. Which graph is for argon?
"Having a Ball with Chemistry": More Things to TryThomas S. Kuntzleman, David Sellers, and Rachel Hoffmeyer An activity is described in which students test the rebound properties of superballs, racquetballs, "happy" and "sad" balls at many temperatures. Students use the results to estimate the glass transition temperature of the elastic polymer that comprises each ball, a segue into the classic demonstration of shattering a racquetball that has been immersed in liquid nitrogen. Kuntzleman, Thomas S.; Sellers, David; Hoffmeyer, Rachel. J. Chem. Educ.2008, 85, 1478.
Physical Properties
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
Fog Machines, Vapors, and Phase DiagramsEd Vitz This series of demonstrations elucidate the operation of commercial fog machines using common laboratory materials and can be adapted for elementary through tertiary levels. The formation of fogs is discussed in terms of the phase diagram for water and other chemical principles. Vitz, Ed. J. Chem. Educ.2008, 85, 1385.
Maze: Bouncy Ball This puzzle, part of a collection from the ACS 'Science for Kids' Web site, has students follow a maze to collect various objects required to complete a science activity for making a bouncy ball (http://portal.acs.org:80/portal/fileFetch/C/WPCP_011041/pdf/WPCP_011041.pdf).
Polymerization |
Physical Properties |
Materials Science
Meg A. Mole's Bouncy Ball Factory This interactive game was developed as part of a collection from the ACS 'Science for Kids' Web site. In this game, students try to find the optimum mix of materials for producing a bouncy ball.
Applications of Chemistry |
Polymerization |
Physical Properties |
Materials Science
A Stickyometer Some substances are stickier than others. In this activity students investigate and measure the stickyness of various foods. They construct a device to help measure how sticky a substance is and then use it to evaluate three types of food.
Characteristics of MaterialsAmerican Chemical Society What makes diapers absorbent? Is peanut butter stickier than syrup or jelly? Strong, stretchy, sticky, or sweet—everything around us has special properties which make them unique. See if you can identify and compare the characteristics of materials.
Industrial Chemistry |
Physical Properties |
Reactions |
Consumer Chemistry |
Gases |
Carbohydrates |
Proteins / Peptides |
Crystals / Crystallography |
Water / Water Chemistry |
Plant Chemistry |
Dyes / Pigments |
Lipids |
Molecular Properties / Structure |
Applications of Chemistry |
Nutrition |
Acids / Bases |
Chromatography |
Magnetic Properties |
Metals |
Polymerization |
Solutions / Solvents |
Descriptive Chemistry |
Food Science
The Shapes of MoleculesEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Molecular Properties / Structure
Multiple Bonds and Molecular ShapesEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
