A-LevelChemistryChemical periodicityFeb/Mar 2025Paper 1 Q31 Mark
X and Y are elements from the same group of the Periodic Table. The 5th to 9th ionisation energies for X and Y are shown. ionisation energy/kJmol⁻¹ 5th 6th 7th 8th 9th element X 11020 15160 17870 92040 106437 element Y 6540 9360 11020 33360 38600 Which row identifies elements X and Y?
Aargon neon
Bchlorine fluorine
Cfluorine chlorine
Dneon argon
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The correct answer is C. 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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