A-LevelChemistryChemical periodicityOct/Nov 2025Paper 1 Q71 Mark
X and Y are different elements in Period 3. Atoms of X and Y each have only one completely filled orbital in their highest occupied energy sub-shell. Y has a greater first ionisation energy than X. Which row shows the structure and bonding in X and Y?
Agiant metallic, giant metallic
Bgiant metallic, simple molecular
Cgiant covalent, simple molecular
Dsimple molecular, simple molecular
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The correct answer is B. 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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