A-LevelChemistryAtomic structure9701/12 · May/June 2025 · Q141 Mark

A helium ion contains two protons, two neutrons and one electron. This helium ion and a proton are passed separately through a uniform electric field. The particles are travelling at the same velocity. Which arrow describes the path of each particle? [Figure showing electric field with '+' and '-' plates and 5 numbered arrows for particle paths]

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

A[helium ion: 1, proton: 2]

B[helium ion: 2, proton: 1]

C[helium ion: 4, proton: 5]

D[helium ion: 5, proton: 4]

✓ Correct answer

C: [helium ion: 4, proton: 5]

Oracle Prep sorts past-paper questions by topic, so you can drill Atomic structure and see which topics are most likely to come up next.

Topic: Atomic structure, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2025 Paper 1 Variant 2, question 14.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content