A-LevelChemistryAtomic structureMay/June 2020Paper 1 Q341 Mark
Sodium and fluorine are both reactive elements. Two atoms are described. F Na atomic number 9 11 nucleon number 19 23 Which statements about these two atoms, and the ions they can form, are correct? 1 One Na atom has two more protons than one F¯ ion. 2 One Na atom has two more neutrons than one F atom. 3 One Na⁺ ion has the same number of electrons as one F¯ ion.
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 A: 1, 2 and 3 are correct
📋 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...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
🔒
Unlock the Examiner's Analysis
Sign up for free to reveal the full examiner report, trap analysis, and mark scheme breakdown for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep