A sealed ampoule contains of Rn (half-life )

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

Problem

A sealed ampoule contains

0.20\,\mu\text{g}

^{222}

Rn (half-life

=3.8\,\text{d}

). What will be the activity of the gas after

5.0\,\text{d}

? (a)

0.68\,\text{GBq}

(b)

1.15\,\text{GBq}

(c)

0.46\,\text{GBq}

(d)

0.57\,\text{GBq}