Question
Radioactive substances decay by first-order kinetics. How many years would be required for a sample containing strontium-90 to decrease to 58.32% of its initial activity? The half-life of strontium-90 is 2.88e1 years.
Answers
DrBob222
k = 0.693/t<sub>1/2</sub>
Substitute k into the below.
ln(No/N) = kt
No = 100
N = 58.32
K from above.
Solve for t in years.
Substitute k into the below.
ln(No/N) = kt
No = 100
N = 58.32
K from above.
Solve for t in years.