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Sub-Atomic Particles

A radioactive...

Question

A radioactive material has a half life of $1$ minute. If one of the nuclei decays now, when will the next one decay?

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Solution

Radioactive decay is a random process. No matter how long a particular nuclei has existed or what is the half life of material, it is impossible to predict when a particular nuclei will decay.
Also that's the reason that we have to calculate mean life of a material because we can't say anything about the exact lifetime of a radioactive material.
Hence, the nuclei can decay at anytime.

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