Neco Model Questions Vol1 2025 Physics Question 15
Practice objective / multiple choice question 15 from the 2025 Neco Model Questions Vol1 Physics examination.
A radioactive isotope \(A\) decays to isotope \(B\) with a half‑life of \(30\ \text{min}\). Isotope \(B\) further decays to a stable isotope \(C\) with a half‑life of \(10\ \text{min}\). Initially the sample contains \(1.0\times10^{6}\) atoms of \(A\) and none of \(B\). After exactly \(1\ \text{hour}\), how many atoms of \(B\) are present? (Give your answer as an integer, rounding to the nearest whole atom.)
Answer Options
About This Question
This is Neco Model Questions Vol1 2025 Physics Question 15. It is one of the objective questions from the 2025 Neco Model Questions Vol1 Physics examination.
Difficulty level: Hard .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.