A chlorine-37 atom is represented as 1737Cl^{37}_{17}\text{Cl}1737Cl. This atom forms a chloride ion, Cl−\text{Cl}^-Cl−.
Which row in the table correctly identifies the number of neutrons and electrons in a single Cl−\text{Cl}^-Cl− ion?
| Number of neutrons | Number of electrons | |
|---|---|---|
| Row A | 20 | 16 |
| Row B | 17 | 18 |
| Row C | 20 | 18 |
| Row D | 17 | 16 |
Row A
Row B
Row C
Row D
87 exam-style questions on Edexcel GCSE Chemistry 2.1 Atomic structure, covering 2.1.1 Development of the atomic model, 2.1.2 Structure of the atom and subatomic particles, 2.1.3 Mass number, isotopes and relative atomic mass, and 2.1.4 Calculating relative atomic mass from isotopic abundance. Each one has a worked solution and a mark scheme showing where the marks go.