**What Is The Half Life Of A Radioisotope Apex**. The average time it takes for the number of nuclei in a radioactive isotope sample to halve. 4,468.109 years what is the longest radioactive halflife?

4,468.109 years what is the longest radioactive halflife? Radioisotopes, by definition, are radioactive. What is the age of an old bottle of wine, whose { }_{1} \mathrm{h}^{3} radiation is 10 \% of that pr.