All other isotopes of aluminium are radioactive. One of the most stable of such is 26Al, by using a half-lifetime of 717,000 years: when it had been current in addition to steady 27Al in the interstellar medium from which the Photo voltaic System fashioned (believe to are actually made by stellar https://raymondpethu.blogpayz.com/37610569/indicators-on-sheds-and-garages-you-should-know