A-LevelChemistryChemical periodicityMay/June 2011Paper 1 Q151 Mark
The diagram shows the first ionisation energies of 11 consecutive elements. [Figure 15.1] Which type of elements are labelled X and Y?
AGroup I metals
BGroup II metals
Chalogens
Dnoble gases
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The correct answer is A. This question tests the candidate's understanding of chemical periodicity within the Chemistrysyllabus. The examiner's mark scheme requires...
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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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