Record number on chart. Replace "decayed atoms" with paper ... What do the curves suggest about the rate of radioactive decay in general? Groups can challenge each other to determine the "age ...

Radioactive decay is a spontaneous and random process. A block of radioactive material will contain many trillions of nuclei and not all nuclei are likely to decay at the same time so it is ...

All types of radioactive decay can be detected by a Geiger-Muller tube, or G-M tube. The radiations ionise the gas inside the G-M tube and the resulting charged particles move across the chamber ...