Let's enter the world of radioactivity together! What is the concentration of radon in Serbia and in certain places? Should we be worried? We will measure with a von Geiger-Müller counter and show the activity of the school's radioactive source!

AUTHORS: Mirjana Elenkov, Marko Stojanović, Mina Ristic, Stefan Jovanović and Svetomir Jončić, Gimnazija Pirot