The half-life period of a radioactive su...

The half-life period of a radioactive substance is 8 years. After 16 years, the mass of the substance will reduce from starting 16.0 g to

A

8.0 g

B

6.0 g

C

4.0 g

D

2.0 g

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The correct Answer is:

C

`n = (16)/(8) = 2, N = (N_0)/(2^n) = 16.0/2^n = (16.0)/(2^2) = (16.0)/(4) = 4.0 g`

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