A-LevelChemistryChemical periodicityOct/Nov 2019Paper 1 Q121 Mark
Which diagram correctly shows the electronegativity of the elements Na, Mg, Al and Si plotted against their first ionisation energies? [Figure 12.1]
A[Diagram plotting electronegativity vs first ionisation energy for Na, Mg, Al, Si, showing Al with lower first ionisation energy than Mg]
B[Diagram plotting electronegativity vs first ionisation energy for Na, Mg, Al, Si, showing Al with higher first ionisation energy than Mg]
C[Diagram plotting electronegativity vs first ionisation energy for Na, Mg, Al, Si, showing Al with higher electronegativity than Si]
D[Diagram plotting electronegativity vs first ionisation energy for Na, Mg, Al, Si, showing Al with lower electronegativity than Mg]
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of chemical periodicity 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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