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Law of Radioactivity

A certain nuc...

Question

A certain nuclide has a half-life period of 30 minutes. If a sample containing 600 atoms is allowed to decay for 90 minutes, how many atoms will remain

A

200 atoms

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B

450 atoms

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C

75 atoms

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D

500 atoms

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Solution

The correct option is C 75 atoms
$n - \frac{90}{30} - 3 \Rightarrow N - \frac{600}{2^{3}} - 75 a t o m s$ .

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