A radioactive source contains of isotope P (mass number , ) and of isotope Q (mass…

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

Problem

A radioactive source contains

0.50\,\mu\text{g}

of isotope P (mass number

50

T_{1/2}=1.5\,\text{h}

) and

0.50\,\mu\text{g}

of isotope Q (mass number

100

T_{1/2}=3.0\,\text{h}

). Both isotopes are pure and non-interacting. What is the approximate ratio of the total activity at

t=0

to the total activity at

t=6.0\,\text{h}

? (a)

8:1

(b)

4:1

(c)

10:1

(d)

16:1