The table shows the numbers of protons and electrons in ions R and S.
| Ion | Number of protons | Number of electrons |
|---|---|---|
| R | 12 | 10 |
| S | 9 | 10 |
Ions R and S form an ionic compound.
Use the data in the table to explain the charge on ion R.
Deduce what happened to an atom of S when it formed ion S.
Deduce the simplest ratio of ions R to ions S in the compound. Explain your answer.
Explain what holds the ions together in the compound.
119 exam-style questions on Edexcel GCSE Chemistry 2.3 Ionic bonding, covering 2.3.1 Ions and the formation of ionic bonds, 2.3.2 Naming and deducing formulae of ionic compounds, and 2.3.3 Giant ionic lattices. Each one has a worked solution and a mark scheme showing where the marks go.