Chemistry

Problem

A pure sample initially contains

1.0\times10^{12}

nuclei of a parent nuclide P (half-life

T_{1/2}=10\,\text{d}

) and none of its radioactive daughter D (half-life

T_{1/2}=1\,\text{d}

). Calculate the activity of D after

2\,\text{d}

. (Take

\ln2=0.693

.) a)

1.0\times10^{6}\,\text{Bq}

7.0\times10^{5}\,\text{Bq}

5.5\times10^{5}\,\text{Bq}

4.5\times10^{5}\,\text{Bq}