PHYSICS
JAMB 2016 - Question 32
Physics 2016 JAMB Past Questions - Question 32: A radioactive sample initially contains N atoms . After three half-lives the number of atoms that have disintegrated is
Choose the correct answers from the options given.
A:
B:
C:
D:
Correct Answer
D
Explanation
After three half-lives, the number of atoms that have disintegrated can be calculated using the formula:
Number of atoms disintegrated = N * (1/2)^(number of half-lives)
Since you mentioned that the initial sample contains N atoms and three half-lives have passed, the number of atoms that have disintegrated would be:
Number of atoms disintegrated = N * (1/2)^3 = N * (1/8) = N/8
Therefore, after three half-lives, the number of atoms that have disintegrated is N/8.
Frequently Asked Questions
Examkits is a JAMB CBT practice platform that provides over 20 years of past questions, Post UTME questions, and detailed video solutions to help students prepare for their exams.
You can practice JAMB past questions online, on Android, or on a desktop using the Examkits app. Just register on our website and choose your preferred device.
Yes. Our Android and Windows versions support offline usage. Once downloaded and activated, no internet is required to use most of the features.
Yes, Examkits provides detailed video explanations for all JAMB past questions from 2000 to 2024, helping students understand how to solve each problem.
Examkits offers free practice for some subjects. However, full access requires a one-time affordable activation fee for each version of the app.