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5.2.4a Half-life

A scientist measures the activity of a radioactive sample every 15 minutes. The table shows the readings:

\begin{array}{|c|c|} \hline \text{Time / min} & \text{Activity / Bq} \\ \hline 0 & 1200 \\ 15 & 850 \\ 30 & 600 \\ 45 & 425 \\ 60 & 300 \\ 75 & 210 \\ 90 & 150 \\ \hline \end{array}

What is the half-life of the source?

$min15\text{ min}$

$min30\text{ min}$

$min45\text{ min}$

$min60\text{ min}$

5.2.4a Half-life Questions

144 exam-style questions on CIE IGCSE Physics 5.2.4a Half-life. Each one has a worked solution and a mark scheme showing where the marks go.

A scientist measures the activity of a radioactive sample every 15 minutes. The table shows the readings:

\begin{array}{|c|c|} \hline \text{Time / min} & \text{Activity / Bq} \\ \hline 0 & 1200 \\ 15 & 850 \\ 30 & 600 \\ 45 & 425 \\ 60 & 300 \\ 75 & 210 \\ 90 & 150 \\ \hline \end{array}

What is the half-life of the source?

$min15\text{ min}$

$min30\text{ min}$

$min45\text{ min}$

$min60\text{ min}$

144 exam-style questions on CIE IGCSE Physics 5.2.4a Half-life. Each one has a worked solution and a mark scheme showing where the marks go.