The half life of the isotope _ 11 Na ^ 24 is 15 hrs . How much time does it take for 7 8…
Physics · JEE Advanced · NTA Exams — Atoms and Nuclei
The half life of the isotope \({ }_{11} \mathrm{Na}^{24}\)is 15 hrs. How much time does it take for \(\frac{7}{8} \text { th }\) of a sample of this isotope to decay
- 75 hrs
- 65 hrs
- 55 hrs
- 45 hrs
Answer
(D) 45 hrs
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