A-LevelChemistryChemical periodicityFeb/Mar 2025Paper 1 Q171 Mark
Q, R and S are consecutive elements in Period 3 of the Periodic Table. Element R has the highest first ionisation energy and the lowest melting point of these three elements. What are the identities of Q, R and S?
ANa Mg Al
BMg Al Si
CAl Si P
DSi P S
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The correct answer is D. 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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