A-LevelChemistryChemical periodicityMay/June 2016Paper 1 Q31 Mark
Elements X and Y are in the same group of the Periodic Table. The table shows the first six ionisation energies of X and Y in kJ mol¯¹. 1st: X 800, Y 1000 2nd: X 1600, Y 1800 3rd: X 2400, Y 2700 4th: X 4300, Y 4800 5th: X 5400, Y 6000 6th: X 10400, Y 12300 What could be the identities of X and Y?
Aantimony, Sb arsenic, As
Barsenic, As antimony, Sb
Cselenium, Se tellurium, Te
Dtellurium, Te selenium, Se
✓ 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