A-LevelChemistryAtomic structureOct/Nov 2020Paper 1 Q311 Mark
The symbol for a phosphorus ion is ¹⁵³³P³⁻. The symbol for a potassium ion is ¹⁹³⁷K⁺. What do these two ions have in common? 1 the same number of electrons 2 the same number of neutrons 3 the same number of protons
A1, 2 and 3 are correct
B1 and 2 only are correct
C2 and 3 only are correct
D1 only is correct
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of atomic structure within the Chemistrysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
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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