All other isotopes of aluminium are radioactive. The most stable of such is 26Al, having a half-lifetime of 717,000 several years: although it had been current in conjunction with stable 27Al in the interstellar medium from which the Solar System shaped (imagine to have already been produced by stellar nucleosynthesis also), https://aluminiumgreenhouse46789.like-blogs.com/37293245/fascination-about-sheds-and-garages