A-LevelChemistryChemical periodicityOct/Nov 2023Paper 1 Q191 Mark
X and Y are atoms of different elements in Period 3 of the Periodic Table. Neither X nor Y is argon. X is a non-metal. X has a greater atomic radius than Y. Which statement is correct?
AX has more occupied electron shells than Y.
BX has more protons in each atom than Y.
CX has the same number of outer electrons in each atom as Y.
DY is a non-metal.
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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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