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1. |
A certain nuclide has a half-life period of 30 minutes. If a sample containing 600 atoms is allowed to decay for 90 minutes, how many atoms will remain [NCERT 1978] |
A. | 200 atoms |
B. | 450 atoms |
C. | 75 atoms |
D. | 500 atoms |
Answer» D. 500 atoms | |