Question

An element has a half-life of 29 hours. If 100 mg of the element decays over a period of 58 hours, how many mg of the element will remain?
So far I have;
n= elapsed time/ half-life
=58/29
n=2

Answer 1

so
if 100 at t = 0
then 50 at t = 29
then 25 at t = 58

or 100* (1/2)^2 = 100 * 1/4 = 25

Answer 2

Thank you

Answer 3

You are welcome.