Question 27 – Radioactive decay, half-life and uses - Questions

The graph shows the radioactive decay curves for two different radioisotopes, $X\,$ and $Y$ .

![A line graph titled 'Decay Curves of Isotopes X and Y' showing Activity in counts per minute (cpm) on the vertical y-axis, scaled from 0 to 600 cpm with major grid lines every 100 cpm. The horizontal x-axis shows Time in days, scaled from 0 to 20 days with major grid lines every 2 days.

Both isotope curves start at 600 cpm at 0 days.
The curve for Isotope X falls steeply, passing exactly through the coordinates (0, 600), (3, 300), (6, 150), and (9, 75).
The curve for Isotope Y falls more gradually, passing exactly through the coordinates (0, 600), (8, 300), and (16, 150).](https://assets.mathsgenie.co.uk/aqa-qb/30af8667-fd73-466e-9110-0d96413f8f12.png)

The graph shows the radioactive decay curves for two different radioisotopes, $X\,$ and $Y$ .

Both isotope curves start at 600 cpm at 0 days.
The curve for Isotope X falls steeply, passing exactly through the coordinates (0, 600), (3, 300), (6, 150), and (9, 75).
The curve for Isotope Y falls more gradually, passing exactly through the coordinates (0, 600), (8, 300), and (16, 150).](https://assets.mathsgenie.co.uk/aqa-qb/30af8667-fd73-466e-9110-0d96413f8f12.png)

Radioactive decay, half-life and uses

Question 19

Radioactive decay, half-life and uses

Question 19

Radioactive decay, half-life and uses

Question 19

Radioactive decay, half-life and uses Questions

Radioactive decay, half-life and uses

Question 19

Radioactive decay, half-life and uses Questions