Question

Choose the BEST answer to the following.

A radioactive sample has a half-life of 1 hour. Starting with 1.000 gram of it at noon, how much remains at 3:00 PM?

(a) 0.50 g.

(b) 0.25 g.

(c) 0.125 g.

(d) 0.0625 g.

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Physics of Atoms

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