Question 17.9: Po-210 is an alpha emitter with a half-life of 138 days. How......
Po-210 is an alpha emitter with a half-life of 138 days. How many grams of Po-210 remain after 552 days if the sample initially contained 5.80 g of Po-210?
Step-by-Step
\begin{array}{lcc} \hline \text { Mass of Po-210 (g) } & \text { Number of Half-Lives } & \text { Time (days) } \\ \hline 5.80 & 0 & 0 \\ 2.90 & 1 & 138 \\ 1.45 & 2 & 276 \\ 0.725 & 3 & 414 \\ 0.363 & 4 & 552 \\ \hline \end{array}
The amount of Po-210 left after 552 days is 0.363 g.
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