A sample of a radioactive substance is reduced to 1.0 gram after 4 half-lives. Determine the mass of the original sample

Physics

1 answer:

luda_lava [24]3 years ago

6 0

After 4 half-lives, there was 1 gram.

1 half-life earlier, after 3 half-lives, there must have been 2 grams.

1 half-life earlier, after 2 half-lives, there must have been 4 grams.

1 half-life earlier, after 1 half-life, there must have been 8 grams.

1 half-life earlier, when it started decaying, there must have been 16 grams. <em>(B) </em>

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