Chemistry · May / June 2020 · Paper 12 · Question 7

The diagram shows the relative mass and the relative charge of two particles, ○ and ●, present in atoms and ions. [graph: relative mass vs relative charge, ○ at (0, 2000), ● at (–1, 1)] Which of these particles are present in a hydrogen atom and in a hydrogen ion?

1. AH: both ○ and ●; H+: both ○ and ●
2. BH: both ○ and ●; H+: ○ but not ●
3. CH: ● but not ○; H+: neither ○ nor ●
4. DH: ○ but not ●; H+: ● but not ○

As printed in the paper