kaitlynn0199 kaitlynn0199

11-02-2017
Chemistry

Answered

If you start with 100 grams of a radionuclide, how much will you have after two half-lives have passed?

Verified Answer :

cdrosss1214 cdrosss1214

11-02-2017

After first half-life you will have 100/2=50g. After second half-life you will have 50/2=25g.

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Kerbal27 Kerbal27

11-02-2017

25 grams.

A half life is the amount of time it takes for an isotope to decay half of itself.

So after one half life, there will be half of the original amount.

100/2=50

After another half life, there will be half of that amount.

50/2 = 25

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