The half-life of iodine is
Correct answer: A. 8 days
- A. 8 days
- B. 8 hours
- C. 15 days
- D. 15 hours
Explanation
The half-life of a radioactive substance is the time it takes for half of the radioactive atoms in a sample to decay. It is a fundamental property of the radioactive isotope and is used to describe the rate of radioactive decay.The mathematical expression for radioactive decay is:N(t) = N0 * e^(-λt)Where:N(t) is the number of radioactive atoms remaining at time tN0 is the initial number of radioactive atomsλ is the decay constant, which is related to the half-life (t1/2) by the equation:λ = ln(2) / t1/2Substituting the given half-life of 8 days, we get:λ = ln(2) / 8 days = 0.0866 days^-1This means that the half-life of iodine is 8 days, as indicated by the correct answer a)
Last updated
About Nuclear Physics
Atomic nuclei contain protons and neutrons, with nuclear size, mass defect and binding energy describing their stability. The work covers alpha, beta and gamma decay, decay equations, half-life and decay rate, along with radiation safety and medical applications such as imaging, radiotherapy and tracers.
Practise Nuclear Physics
1,254 free Nuclear Physics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 13 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.