A-LevelChemistryChemical periodicityMay/June 2023Paper 1 Q191 Mark
Sodium, magnesium, aluminium, silicon and phosphorus are all elements in Period 3 of the Periodic Table. Three statements about the oxides and chlorides of these elements are given. 1 The ionically bonded oxides all react with dilute hydrochloric acid. 2 All metal chlorides produce neutral solutions when added to water. 3 The two most electronegative elements both form covalently bonded chlorides. Which statements are correct?
A1, 2 and 3
B1 and 2 only
C1 and 3 only
D2 and 3 only
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of chemical periodicity 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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