radioactive element

A radioactive element never decays completely, but after about 10 half-lives, the remaining fraction becomes negligible (less than 0.1% of the original amount). Related Questions: What fraction of a radioactive element will be left after 4 half-lives have elapsed? What is common in isotopes of an element and what is different in them? It happens … Read more

The fraction of a radioactive element left after nnn half-lives can be found using the formula: Fraction remaining=(1/2)n For n=4 half-lives: Fraction remaining=(1/2)4=1/16\​ So, after 4 half-lives, 1/16 of the original amount of the radioactive element will remain. Related Questions: How long will a radioactive element take to decay completely? What is common in isotopes of … Read more