Radon-222 has a half-life of

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

Problem

3.8\,\text{days}

. A sealed sample shows an initial activity of

8.0\times10^{4}\,\text{Bq}

. What will be its activity after

11.4\,\text{days}

? (a)

2.7\times10^{4}\,\text{Bq}

(b)

5.0\times10^{3}\,\text{Bq}

(c)

1.0\times10^{4}\,\text{Bq}

(d)

2.0\times10^{4}\,\text{Bq}