PH-2096
Half-life
Physics · Secondary 4 · Medium · Half-life
A radioactive isotope has a half-life of 5.0 days. Its activity is 640 counts per minute today. Assuming no background radiation, what will the activity be after 10 days?
- 80 counts per minute
- 160 counts per minute
- 320 counts per minute
- 640 counts per minute
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.