Compare and discuss graphs for different isotopes. How are the curves similar and different? What do the curves suggest about the rate of radioactive decay in general? Groups can challenge each ...

For example, carbon-14 decays to nitrogen-14 when it emits beta radiation. As this breakdown occurs, the activity of any radioactive source becomes less. This activity is measured in becquerels.

In recent years, some large physics experiments worldwide have been trying to gather evidence of a nuclear process known as ...