Assume that you placed a single atom (let's keep it simple and specify a hydrogen atom) in a theoretical container that could maintain a perfect vacuum. The perfect vacuum being defined as having no matter, electromagnetic radiation, neutrinos etc. What would be the ultimate fate of that atom? Would it slowly lose any energy it possessed when first put in the container and eventually degrade to a thin quark soup? How long would it take the atom to degrade if indeed that was it's fate.