upper-division undergraduate

Paper Snowflakes to Model Flat Symmetrical Molecules

Flat, symmetrical molecules can be modeled by folding a sheet of paper, cutting patterns into the folded structure, and unfolding to produce the flat paper models. The finished models resemble paper snowflakes, but have a variety of rotational symmetries. Template patterns for several molecules are available for download in the Supporting Information.

A Polystyrene Model of Polystyrene Tacticity

Thin sheets of polystyrene can be patterned with permanent markers to represent repeating units of the polymer and then shrunk down in size using heat. The shrunken models of the repeating units can be connected with a string and then flipped into positions to demonstrate different types of polymer tacticity.

JCE 98.05 May 2021 Issue Highlights

The May 2021 issue of the Journal of Chemical Education is now available online to subscribers. Topics featured in this issue include: teaching biochemistry, assessment, learning to think like a scientist, environmental chemistry, forensic chemistry, surface chemistry, solution mixing, organic chemistry laboratory experiments and activities, computer-based experiences, research on promoting student success, from the archives: systems thinking.