sciencemath

posted by Anonymous

Suppose a laboratory has a 31 g sample of polonium-210. The half-life of polonium-210 is about 138 days. How many half-lives of polonium-210 occur in 966 days? How much polonium is in the sample 966 days later?

1. Steve

966/138 = 7

7 half-lives means that 1/128 of the original 31g remains.

2. Son Ma

Suppose a laboratory has a 31 g sample of polonium-210. The half-life of polonium-210 is about 138 days. How many half-lives of polonium-210 occur in 966 days? How much polonium is in the sample 966 days later?

3. Anonymous

7:.24

4. Anonymous

21

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