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if you are given 80 grams of a radioactive element and told that its half-life is 10 years. How much will be left of the substance after 20 years.​
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if you are given 80 grams of a radioactive element and told that its half-life is 10 years. How much will be left of the substance after 20 years.​

User Artem Matiushenko
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1 Answer

2 votes

Answer:

20 grams

Explanation:

20 years is 2 half lives

1/2 * 1/2 = 1/4

1/4 * 80 = 20 grams

User Jimmy Collins
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