The isotope calcium-41 decays into potassium-41, with a half-life of 1.03 × 10^5 years. there is a sample of calcium-41 containing 5 × 10^9 atoms. how many atoms of calcium-41 and potassium-41 will there be after 4.12 × 10^5 years? how many calcium and how many potassium?
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half lives
atoms left
Atoms of Potassium 
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The isotope calcium-41 decays into potassium-41, with a half-life of 1.03 × 10^5 years. there is a s...
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