A radioactive sample initially consists only of nuclide

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

Problem

P

. After

12.0\,\text{h}

the numbers of

P

atoms and its stable daughter

D

atoms are equal. What is the decay constant

\lambda_P

P

? (a)

5.8\times10^{-2}\,\text{h}^{-1}

(b)

1.2\times10^{-1}\,\text{h}^{-1}

(c)

4.2\times10^{-2}\,\text{h}^{-1}

(d)

2.5\times10^{-2}\,\text{h}^{-1}