Asked by lex

Potassium-40 has a half life of 1.2 billion years and decays into the stable daughter isotope Argon-40. If you find a rock that contains 20 Potassium-40 atoms and 60 Argon-40 atoms, how old is the rock?

8 years ago

Answered by Anonymous

1.2 billion

8 years ago

Answered by AJ

2.6 billion

8 years ago

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