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A radioactive sample had an initial act...

A radioactive sample had an initial activity of 56 dpm . After 69.3 minutes, it was found to have an activity of 28 dpm . Find the number of atoms in a sample having an activity of 100 dpm.

A

693

B

100

C

1000

D

10000

Text Solution

Verified by Experts

The correct Answer is:
D
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