Physics

Problem

0.50\,\text{g}

sample of

^{131}\text{I}

(atomic mass

131\,\text{u}

, half-life

8.0\,\text{days}

) is freshly prepared. Calculate its initial activity in Bq. \;(Avogadro constant

N_A = 6.022\times10^{23}\,\text{mol}^{-1}