An ion of a specific isotope of selenium is represented as 80Se2−^{80}\text{Se}^{2-}80Se2−.
Which row in the table correctly identifies the number of protons, neutrons, and electrons in this ion?
| Number of protons | Number of neutrons | Number of electrons | |
|---|---|---|---|
| Row A | 34 | 46 | 32 |
| Row B | 46 | 34 | 36 |
| Row C | 34 | 46 | 36 |
| Row D | 36 | 44 | 34 |
Row A
Row B
Row C
Row D
120 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.