The half-life of a radioactive substance...

The half-life of a radioactive substance against `alpha-`decay is `1.2 xx 10^7 s`. What is the decay rate for `4 xx 10^15` atoms of the substance ?

A

`2.3xx10^8` atom/s

B

`3.2xx10^8` atom/s

C

`2.3xx10^11` atom/s

D

`3.2xx10^11` atom/s

Text Solution

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The correct Answer is:

A

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