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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

`4.6 xx 10^(12)` atoms/s

B

`2.3 xx 10^(11)` m/s

C

`4.6 xx 10^(10)` m/s

D

`2.3 xx 10^(8)` atoms/s

Text Solution

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The correct Answer is:
D
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