The half-life of a radioisotope is four ...

The half-life of a radioisotope is four hours. If the initial mass of the isotope was 200g. The mass remaining after 24hours undecayed is:

A

3.125 g

B

2.084 g

C

1.042 g

D

4.167 g

Verified by Experts

The correct Answer is:

A

`N/(N_0) = (1/2)^((T)/(t_(1//2))) , N/(200) = (1/2)^((24)/(4)) , N/(200) = (1/2)^6`
`N = (200)/(64) = 3.125 g `

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