A-LevelPhysicsNuclear physicsOct/Nov 2012Paper 1 Q391 Mark
A material contains a radioactive isotope that disintegrates solely by the emission of α-particles at a rate of 100 s⁻¹. Which statement about this material is correct?
AThe number of atoms in the material diminishes at a rate of 100 s⁻¹.
BThe number of neutrons in the material diminishes at a rate of 100 s⁻¹.
CThe number of nucleons in the material diminishes at a rate of 400 s⁻¹.
DThe number of protons in the material diminishes at a rate of 100 s⁻¹.
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of nuclear physics within the Physicssyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep