Physics

Physics

Problem

Radon-222 has a half-life of

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}

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