If represents the initial number of nuclei of a radioactive element, what fraction of the original n — Nuclear Chemistry and Radioactivity Chemistry Question

💡 Solution & Explanation

The fraction of nuclei remaining undecayed after $n$ half-lives is $(1/2)^n$. Therefore, the fraction that has decayed is the initial amount ($1$) minus the remaining amount, which gives $1 - (1/2)^n$.