A technician records incomplete information about two particles, P and Q.
Particle P is an ion. Particle Q is an atom with no overall charge.
| Particle | Number of protons | Number of neutrons | Number of electrons | Mass number |
|---|---|---|---|---|
| P | 15 | 16 | 18 | not given |
| Q | not given | not given | 15 | 33 |
Calculate the overall charge on particle P.
A student says, ‘Atom Q could form ion P by changing only its number of electrons.’
Evaluate the student's statement.
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.