A-LevelChemistryChemical periodicityOct/Nov 2019Paper 1 Q31 Mark
The graph shows the successive ionisation energies of element X and element Y. Both elements are in Period 3. [Figure 3.1]
AAn atom of element X needs one extra electron for a full outer shell; an atom of element Y needs three extra electrons for a full outer shell.
BAn atom of element Y has five electrons in the 3p subshell.
CElement X has an oxidation number of +7 in most of its compounds.
DWhen element X combines with element Y, the bonding is ionic.
✓ Correct Answer
The correct answer is A. 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...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep