Question
A radioactive sample contains $1.55 \mathrm{~g}$ of an isotope with a half-life of $3.8$ days. What mass of the isotope remains after 5.5 days? (Assume no excretion of the nuclide from the body.)
Step 1
We can calculate this using the half-life formula, which is $T_{\text{half}} = \frac{\ln(2)}{k}$. Rearranging this formula gives us $k = \frac{\ln(2)}{T_{\text{half}}}$. Show more…
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A radioactive sample contains 1.55 g of an isotope with a half-life of 3.8 days. What mass of the isotope remains after 5.5 days? (Assume no excretion of the nuclide from the body.)
A radioactive sample contains 1.55 g of an isotope with a half-life of 3.8 days. What mass of the isotope remains after 5.5 days?
A radioactive sample contains 1.55 $\mathrm{g}$ of an isotope with a half-life of 3.8 days. What mass of the isotope remains after 5.5 days?
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