Solved: Some radioactive isotopes have half-lives that are
Chapter , Problem 87(choose chapter or problem)
Some radioactive isotopes have half-lives that are largerthan the age of the universe (like gadolinium or samarium).The only way to determine these half-lives is to monitor thedecay rate of a sample that contains these isotopes. Forexample, suppose we find an asteroid that currently containsabout 15,000 kg of ^ G d (gadolinium) and we detect anactivity of 1 decay/s. What is the half-life of gadolinium (inyears)?
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