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

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12 January, 18:33

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Kaleigh Fischer · 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