The rate of decay of a radioactive sample is at time 10 min and at a time 20 min

CHEMISTRY · Subjective · US High School · Chemistry · Atomic Structure & Nuclear · Atomic Structure & Nuclear

Problem

The rate of decay of a radioactive sample is

3.02 \times 10^6 \text{ dpm}

at time 10 min and

1.20 \times 10^6 \text{ dpm}

at a time 20 min. Evaluate the decay constant, half-life and average life of sample.