Technetium 99 is used for brain scans. If a laboratory receives a shipment of 200 g of this isotope, how much will remain after 24 hours? The half life of Technetium 99 is 6 hours.
The basic formula for half life equations is
A= amount remaining
P= original amount
t= elapsed time
h=half life time
so just plug in your amounts
when you put it into a calculator, you get 12.5 grams
Consider that radioactive decay follows first order kinetics. Thus, recall,
Now, let's derive the rate constant,
of technetium-99 will remain of the shipment.