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2 g of a radioactive sample having half ...

2 g of a radioactive sample having half life of 15 days was synthesised on 1st Jan 2009. The amount of the smaple left behind on 1st March, 2009 (including btoh the days)

A

0.124 g

B

1 g

C

0.5 g

D

0 g

Text Solution

Verified by Experts

The correct Answer is:
A
(A) Number of days from `1^(st)` Jan 2009 to `1^(st)` March 2009 ( including both the days ) = 60 days .
Number of half lives in 60 days `= (60)/(15) =4 `
`:.` Amount of sample left after 60 days
`= 2xx(1)/(2^(4))= 0.125 g `
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Knowledge Check

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