I am very thankful for every reply but I am still sort of confused. What, exactly, is radioactive decay?
What is it that happens to an atom? Does it loose an electron/proton/neutron and is now a different element/isotope? Does the speed of any particle in it slow down and this is what a lose of energy means? Does a particle in it evaporate and ultimately I would end up with no atom at all?
I am more interested in what is actually happening than in when it will happen or what the probability of it occurring is.