A-LevelChemistryAtomic structureMay/June 2025Paper 1 Q21 Mark
How many neutrons are contained in an atom of iron with a mass number of 60?
A26
B30
C34
D60
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of atomic structure within the Chemistrysyllabus. 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...
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