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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. What is the amount of the sample left behind on 1st March, 2009 (including both the days) in g?

A

0.125 g

B

1 g

C

0.5 g

D

0 g

Text Solution

Verified by Experts

The correct Answer is:
A
Time period T = (31 + 28 +1) days
= 60 days
No. of half life period (n) = 60/15 = 4
`N/N_0 = (1/2)^n`
`N/2 =(1/2)^4`
N = 2/16 = 0.125 g .
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