Physics

Problem

A nuclide X (half-life

50\,\text{d}

) decays to a radioactive nuclide Y (half-life

5\,\text{d}

) which then decays to a stable product. The initial activity of a pure X sample is

1.0\,\text{MBq}

. Determine the activity of Y after

25\,\text{d}

. a)

1.5\,\text{MBq}

0.75\,\text{MBq}

0.10\,\text{MBq}

0.30\,\text{MBq}