Magnesium oxide has the chemical formula MgO\text{MgO}MgO.
Magnesium oxide contains Mg2+\text{Mg}^{2+}Mg2+ ions and O2−\text{O}^{2-}O2− ions.
The atomic number of magnesium is 12.
What is the electronic configuration of the Mg2+\text{Mg}^{2+}Mg2+ ion?
2.8.22.8.22.8.2
2.82.82.8
2.8.12.8.12.8.1
2.62.62.6
32 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.