A sample of pure (half-life ; atomic mass ) is removed from storage

PHYSICS · Single correct · A Level · Physics · Nuclear physics · Nuclear physics

Problem

1\,\text{mg}

sample of pure

^{60}\text{Co}

(half-life

5.27\,\text{y}

; atomic mass

60\,\text{g mol}^{-1}

) is removed from storage. The initial activity of the sample is nearest to ____. (a)

0.11\,\text{Ci}

(b)

1.6\,\text{Ci}

(c)

1.1\,\text{Ci}

(d)

11\,\text{Ci}