Potassium oxide is a highly reactive ionic compound used in industrial glass manufacture.
Write the electronic configurations for the ions present in potassium oxide, K2O\text{K}_2\text{O}K2O.
potassium ion: ..... oxide ion: .....
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.