Question #1: Can I speak of an atom decaying because one or more of its particles exceeded "escape velocity" according to statistically observed decay rates and a unit of the particle's former affiliation fell apart post-escape somewhat, and the atom was changed into an isotope or some other element? I was wondering, in the case of a single atom, what causes the breakdown. Does this lead to Einstein's [problem with quantum physics] quote (paraphrased) "God does not play dice with the universe". Question #2: Does temperature affect half-life? I.E. theoretically, at zero K, would decay still occur at the same rate as STP?