Physics

Problem

A sample of a radioactive isotope has an activity of

8.0\times10^{3}\,\text{Bq}

at noon on Monday. The isotope’s half-life is

4.0\,\text{days}

. What is the activity of the sample at noon on the following Monday? a)

4.0\times10^{3}\,\text{Bq}

1.4\times10^{3}\,\text{Bq}

2.4\times10^{3}\,\text{Bq}

2.0\times10^{3}\,\text{Bq}