metals

JCE 93.02 February 2016 Issue Highlights

Providing Unique Learning Experiences

The February 2016 issue of the Journal of Chemical Education is now available online to subscribers. Topics featured in this issue include: metal–organic cage & host–guest interactions; safety; innovative teaching approaches; understanding kinetics; computer-based instruction; activities combining ethics and analysis; “play with your food” laboratories; synthesis and analysis in the laboratory; fluorescence-based experiments; chemical education research; mining the archives: copper.

Relative Reactivities of Metals

Last winter I watched a webinar put on by ACS and AACT called "NGSS in the Chemistry Classroom." As a result of watching that webinar, I took an activity that had NGSS Science & Engineering Practices (SEP) integrated into it and tried it out in class. In this activity, students are required to develop their own procedures and data tables.

Investigating the Invisible: Attenuation of Radio Waves

In this Activity, students investigate properties of radiation using a handheld radio. Students compare the abilities of conductive and dielectric materials to attenuate or block, radio waves, and compare the attenuation of AM versus FM radio waves. The radio is placed inside different objects and students record which materials blocked or attenuated the waves.

Memory Metal

In this Activity, students compare the properties of nitinol metal wire (known as "memory" metal) and ordinary wire. Using the observed properties, they design (and possibly make) a toy that would use memory metal to operate. This Activity connects toys with science, and allows students to become inventors as they design a toy of their own.

Silver to Black - and Back

In this Activity, students remove tarnish from silver using the reaction of tarnish with aluminum. If only untarnished silver items are available, students first tarnish them using items that contain sulfur. This Activity could be used with topics such as chemical changes, metals, electrochemistry, and redox reactions. The Activity could introduce a discussion of silver and its reactions.