Hello! I'm a high school science teacher who was recently switched to teaching physics for the first time mid-year. I remember doing an electroplating demonstration in my gradeschool days for a science fair. It was fascinating and now I want to give my students a chance to do some hands-on science with this very useful process. This is the website I liked the best because of its simplicity in materials and procedure: https://www.homesciencetools.com/a/electroplating-science-project I began to check for materials in the old backroom of the physics classroom and found a huge cache of copper and iron electrodes. The trouble is, I also found a plastic container filled with what looks like zinc or iron electrodes, but the container has a Radioactive Material warning on it! I'd attach a picture I took but this forum wants an image url and I don't remember my ancient photobucket password... My questions (at this moment) are: What could this material be? Why is it radioactive? Is it safe to leave uncovered in a drawer for so long? Is it a joke? What should I do about it (if anything)?