All other isotopes of aluminium are radioactive. By far the most steady of such is 26Al, that has a half-life of 717,000 a long time: although it was existing in conjunction with secure 27Al from the interstellar medium from which the Solar Program formed (believe that to have been produced by https://sheds-and-garages23445.bloggactif.com/38946720/5-tips-about-aluminium-greenhouse-you-can-use-today