A radioisotope has a half-life of

PHYSICS · Single correct · CBSE · Physics · Nuclei · Nuclei

Problem

4.0\,\text{days}

. Approximately how long will it take for a sample to decay to

20\%

of its original number of nuclei? (a)

6.4\,\text{days}

(b)

9.3\,\text{days}

(c)

8.0\,\text{days}

(d)

12\,\text{days}