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

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.