Which row in the table correctly describes the change in the number of subatomic particles when a neutral atom forms a positive ion and a negative ion?
| Formation of a positive ion | Formation of a negative ion | |
|---|---|---|
| A | Number of protons increases | Number of electrons increases |
| B | Number of electrons decreases | Number of electrons increases |
| C | Number of electrons decreases | Number of protons decreases |
| D | Number of protons increases | Number of protons decreases |
Row A
Row B
Row C
Row D
284 exam-style questions on CIE IGCSE Physics 5.1 The nuclear model of the atom, covering 5.1.1a Structure of the atom and ions, 5.1.1b Alpha-particle scattering, 5.1.2a Composition of the nucleus and isotopes, 5.1.2b Proton number, nucleon number and nuclide notation, and 5.1.2c Nuclear fission and nuclear fusion. Each one has a worked solution and a mark scheme showing where the marks go.