Order early for pre-holiday delivery. Flinn will be closed December 24th, 2025,
through January 4th, 2026, reopening Monday, January 5th, 2026.
Orders received after 10:30 AM Central Time on Tuesday, December 23rd, 2025,
will ship after we return.
DC11672
Price: FREE
In this lab students are investigating potassium-40. Potassium, one of the most abundant minerals on Earth, is present. Students use dominos to simulate a chain reaction in a nuclear reactor. They model both a critical and a supercritical process to better understand why uranium-238 is used as nuclear reactor fuel as opposed to the much more common uranium-235.