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A potassium-40 sample starts with 50 atoms, and 1.25 billion years later, there are 25 atoms. What is the half-life of potassium-40? A. 2.5 billion years B. 25 years C. 40 years D. 1.25 billion years
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A potassium-40 sample starts with 50 atoms, and 1.25 billion years later, there are 25 atoms. What is the half-life of potassium-40?

A. 2.5 billion years
B. 25 years
C. 40 years
D. 1.25 billion years

User Prithvi Raj
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1 Answer

7 votes
D. 1.25 billion years
User Mohib Sheth
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