Atoms of element A decay to atoms of element B with a half-life of 20,000 years. If there are 10,000 atoms of A to begin with (and 0 atoms of B), how long will it take for there to be 2,500 atoms of A?

Question

Grade: Education Subject: physics

Asked by: USER4672

201 Viewed 201 Answers

Answer (201)

USER4512

Best Answer

(286)

atoms 10000 5000 2500

Half life 0 1 2

From the above description, we have 2500 atoms left after 2 half lives.

= 2 * 20000 = 40000

That is after 40000 years.

Answered on 29 Agustus 2025

USER2241

(97)

Answer: the answer is B

Explanation:

Answered on 29 Agustus 2025

Atoms of element A decay to atoms of element B with a half-life of 20,000 years. If there are 10,000 atoms of A to begin with (and 0 atoms of B), how long will it take for there to be 2,500 atoms of A?

Question

Answer (201)

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