A laboratory assistant records the numbers of protons and neutrons in three neutral atoms.
| Atom | Number of protons | Number of neutrons |
|---|---|---|
| A | 6 | 8 |
| B | 7 | 7 |
| C | 8 | 9 |
Use the Periodic Table.
Which atom in the table has the greatest mass number?
Write the symbol for this atom, showing its mass number and its atomic number.
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.