What is the half-life of a radioisotope if it decays to 25% of its original activity in 7 yr?

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Matthias Braun asked Jul 12, 2023

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What is the half-life of a radioisotope if it decays to 25% of its original activity in 7 yr?

Chemistry
high-school

Matthias Braun asked Jul 12, 2023

by Matthias Braun

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12 votes

Answer:

3.5 yrs

Step-by-step explanation:

If a sample has decayed to 25%, this means 2 half-lives have passed. We are given this is equal to 7 yrs, and it follows that one half life is 3.5 yrs.

Walrus The Cat answered Jul 17, 2023

by Walrus The Cat

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