# phy sci 101

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If you have 24 grams of an unstable atom with a half life of 5,000 years, how many grams would be left after 15,000 years

• phy sci 101 -

Every 5000 years, the amount goes down by half. There three half-lives in 15,000 years.

24/2^3 = 24/8 = 3g

• phy sci -

hafe life

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