A-LevelChemistryAtomic structureOct/Nov 2012Paper 1 Q91 Mark
John Dalton's atomic theory, published in 1808, contained four predictions about atoms. Which of his predictions is still considered to be correct?
AAll atoms are very small in size.
BAll the atoms of a particular element have the same mass.
CAll the atoms of one element are different in mass from all the atoms of other elements.
DNo atom can be split into simpler parts.
✓ Correct Answer
The correct answer is A: All atoms are very small in size.
📋 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...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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