A meteorite was found to contain 40 argon-40 atoms for every 10 potassium-40 atoms. The half-life of postassium-40 is 1.25 billion years. Assuming no loss of daughter isotopes, how old is the moon rock?

2.5 billion years old

3.75 billion years old

6.75 billion years old

10.5 billion years old

Question

Daniel Huerta

21 October, 22:04

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Rayleen · Answer 1

Supposed the moon rock should be 10.5 billing years old

A meteorite was found to contain 40 argon-40 atoms for every 10 potassium-40 atoms. The half-life of postassium-40 is 1.25 billion years. Assuming no loss of daughter isotopes, how old is the moon rock?2.5 billion years old3.75 billion years old6.75 billion years old10.5 billion years old