Initially, a particular sample has a total mass of 180 grams and contains 128 x 1010...

Initially, a particular sample has a total mass of 180 grams and contains 128 x 10¹⁰ radioactive nuclei. These radioactive nuclei have a half life of 1 hour.

(a) After 4 hours, how many of these radioactive nuclei remain in the sample (that is, how many have not yet experienced a radioactive decay)?

. x 10¹⁰ radioactive nuclei

(b) After that same amount of time has elapsed, what is the total mass of the sample, to the nearest gram?

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genius_generous answered 2 years ago

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