A radioisotope has a half-life of 16 h

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

Problem

A radioisotope has a half-life of 16 h. What is the time interval required for the number of undecayed nuclei to decrease from

80\%

25\%

of its initial value? (a)

28\,\text{h}

(b)

32\,\text{h}

(c)

27\,\text{h}

(d)

25\,\text{h}