Chemistry

Problem

A freshly prepared sample of isotope X shows an activity of

8000\,\text{Bq}

. After

2.5\,\text{h}

its activity is found to be

500\,\text{Bq}

. a. (a) Determine the decay constant of isotope X in

\text{h}^{-1}

. b. (b) Calculate its half-life in minutes. c. (c) Compute its mean life in seconds. d. (d) From the instant of preparation, how much total time must pass before the activity falls to

100\,\text{Bq}

Browse the problem library