kinsleykuchar5915 kinsleykuchar5915
  • 24-01-2024
  • Physics
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An α radioactive isotope has a half-life of 30.2 years. How long will it take for the amount of the isotope to decline to less than 1% of the original value?

a) 90.6 years
b) 120.8 years
c) 150.5 years
d) 180.9 years

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