Half-lives of two radioactive substances A and B are respectively 20 minutes and 40…
Physics · JEE Main · NTA Exams — Atoms and Nuclei
Half-lives of two radioactive substances A and B are respectively 20 minutes and 40 minutes. Initially the samples of A and B have equal number of nuclei. After 80 minutes, the ratio of remaining numbers of A and B nuclei is
- 1 : 16
- 4 : 1
- 1 : 4
- 1 : 1
Answer
(C) 1 : 4
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