O-LevelPhysicsNuclear PhysicsOct/Nov 2025Paper 1 Q371 Mark
Which nuclide is produced when thorium-223, ²²³₉₀Th, emits an alpha-particle?
A²¹⁹₈₈Ra
B²¹⁹₉₂U
C²²⁷₈₈Ra
D²²⁷₉₂U
✓ Correct Answer
The correct answer is A. 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