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Transcribed Image Text:The isotope of xenon, Xe-124 has a half-life of 1.8 × 1022 yrs. How long will it take for a
1g sample to decay into lug?
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Concept and Principle:
- Radioactive decay takes place when an unstable nucleus becomes stable. The instability arises due to a mismatch between the number of neutrons and protons. Only a few configurations of neutrons and protons are stable.
- The radioactive decay will be exponential in nature and is given by,
Here N0 is the original number of radioactive nuclei present, t is the time, and t1/2 is the half-life of the radioactive sample. This is known as the exponential law of radioactive decay.
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