to calculate the no.of atoms initially present and the activity.
Asked by Upasana
| 29th Mar, 2012,
07:55: PM
Expert Answer:
Ans =(i) 1.2× 1020 = Number of atoms present initially. (ii) 1.55 × 1014 disintegrations/second
Answered by
| 4th Apr, 2012,
04:48: PM
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