The graph between the instantaneous concentration $(N)$ of a radioactive element and time $(t)$ is
The graph between the instantaneous concentration $(N)$ of a radioactive element and time $(t)$ is
- A
- B
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- D
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A radioactive sample disintegrates via two independent decay processes having half lives $T _{1 / 2}^{(1)}$ and $T _{1 / 2}^{(2)}$ respectively. The effective half- life $T _{1 / 2}$ of the nuclei is
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Half-life of a radioactive substance is $20$ minutes. Difference between points of time when it is $33\%$ disintegrated and $67\%$ disintegrated is approximately ........... $min$
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The activity of a radioactive sample
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