A-LevelPhysicsNuclear physicsFeb/Mar 2017Paper 1 Q391 Mark
A nucleus of sodium-21, ²¹₁₁Na, decays to form a new nucleus containing 10 protons and 11 neutrons. Which leptons are emitted from the sodium-21 nucleus during the decay?
Apositron and an antineutrino
Bpositron and a neutrino
Can electron and an antineutrino
Dan electron and a neutrino
✓ Correct Answer
The correct answer is B. 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