Question

Radium has a half-life of 1620 years. Write the decay function for a 3-mg sample. Find the amount of radium remaining after 50 years

Answer 1

you can use the first order integrated rate law:

\(ln[A]=-kt+ln[A]_o\)

where \([A]_o\) is the original amount
\([A]\) is the amount after, t, time elapsed
t is time
k is the decay constant


k can be found with: \(t_{1\2}=\dfrac{ln(0.2)}{k}\)

Answer 2

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