You can use the radiation analyser opposite to watch nuclear radiation
Click on the sliders on the control panel to set up your desired
radiative conditions. At the moment, you cannot alter the time units,
but hopefully that will soon change.
Now just click on the GO! button and you can watch the atoms decay.
You can repeat the above steps to start a new sequence at any time.
Radiation is a truly random process. The sequence will be different
every time. You'll also notice that the fewer atoms you start with,
the more random the pattern of radiation. If there are only a few
atoms in your sample, they could all decay at once, or several might
remain long after they should have decayed.