Information about four particles, P, Q, R and S, is given below.
| Particle | Atomic number | Mass number | Electrons |
|---|---|---|---|
| P | 8 | 16 | 10 |
| Q | 9 | 19 | 10 |
| R | 10 | 20 | 10 |
| S | 11 | 23 | 10 |
Which statement is correct?
S has 13 neutrons and a 1+ charge.
P has 8 neutrons and a 2+ charge.
Q has 9 neutrons and a 1− charge.
R has 10 neutrons and no overall charge.
101 exam-style questions on OCR GCSE Chemistry 1.2 Atomic structure, covering 1.2.1 Development of the atomic model, 1.2.2 The nuclear model and the size of atoms, and 1.2.3 Subatomic particles in atoms and ions. Each one has a worked solution and a mark scheme showing where the marks go.