Tungsten, W-181 is a radioactive isotope with a half life of 121 days. If a medical lab purchase 24 kg of W-181 how much will be
left after 1 year?
2 answers:
Answer:
2.97 kg.
Step-by-step explanation:
We have been given that Tungsten, W-181 is a radioactive isotope with a half life of 121 days.
We will use half-life formula to solve our given problem.
, where,
A = Final amount.
a = Initial amount,
t = Time,
h = Half life.
Upon substituting our given values in above formula we will get,



Therefore, 2.97 kg of W-181 will be left after 1 year.
3 kg because one year is approximately 3 half-lives of W-181. The amount remaining would be 1/23<span> or 1/8. That is 3 kg of W-181.</span>
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