Originally Posted by Bontrager
Maybe I learned wrong as a Chemistry major but I thought all atoms/molecules decayed given enough time...
i think you are thinking about "hydrogen burning"... there is a great paper on it in the literature, but in short it states that there is always some fussion occuring (two hydrogens form a helium; two heliums form a beryllium; and ect.). This fussion will continue until some isotope (something like lead-208 {double magic number} or iron-something) and that all isotope heavier than this isotope will decay (via alpha, beta, fission, ect) to reach this magic isotope
mind you that the time span for this is infinite and it is just a theory