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1. |
Half-life of a radioactive element is 100 yrs. The time in which it disintegrates to 50% of its mass, will be [MP PMT 1995] |
A. | 50 yrs |
B. | 200 yrs |
C. | 100 yrs |
D. | 25 yrs |
Answer» D. 25 yrs | |