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QAIPMT-2003-Ph-2748: NEET 2003 Physics - Class 12 AIPMT-2003-Ph-2748 Solution: A sample of radioactive element has a mass of 10 g at an…
A sample of radioactive element has a mass of 10 g at an instant t = 0. The approximate mass of this element in the sample after two mean lives is
Multiple Choice Options
- A 1.35 g
- B 2.50 g
- C 3.70 g
- D 6.30 g
Step-by-Step Verified Solution
Using the relation for mean life.
Given : t = 2t = 2 ( 1 _ )
Then from M = M 0 e - _ t = 10e - _ ( 1 _ ) = 10 ( 1 e ) 2 = 1.35 g