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A radioactive sample contains 2.2 mg of ...

A radioactive sample contains 2.2 mg of pure `._(6)^(11)C` which has a half - life period of 1224 seconds. Calculate the number of atoms present initially, and the activity when `5mug` of the sample will be left.

A

`1.20 xx 10^(20)`

B

`2.40 xx 10^(14)`

C

`120 xx 10^(20)`

D

`12 xx 10^(26)`

Text Solution

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The correct Answer is:
A
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