Tom Kuntzleman's blog

Use Your Smartphone as an "Absorption Spectrophotometer"

Smartphone spectrophotometer

Learn a simple and very inexpensive way to build and use an "absorption spectrometer" using a smartphone. This is a great way to implement Beer's Law experiments in your classroom!

Using Chemistry to Find that Silver Lining

Silver plate: before and after

The chemistry of silver and the process in which silver becomes tarnished is explored. Take a new look at an old JCE Classroom Activity.

The Search for the Final Element


Have you ever wondered what is the theoretically largest possible value for the atomic number of an element? Using some introductory physics and algebra, you can get your students thinking about this idea.

The Gas Laws Are Out of This World!

Weather balloon near the edge of space

A few years ago, we launched a weather balloon during our summer science camp. The balloon reached an altitude of 30 km (100,000 ft)! Among other things, this project ended up being a great way to teach campers about the gas laws and how atmospheric pressure decreases with altitude.