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30 points!! What is the mass of a 10 gram sample of potassium-42 that will remain unchanged after 124 hours?
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30 points!!

What is the mass of a 10 gram sample of potassium-42 that will remain unchanged after 124 hours?

User Grrrck
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30 points!! What is the mass of a 10 gram sample of potassium-42 that will remain-example-1
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