One of the compounds used in a laboratory experiment is magnesium chloride, MgCl2\text{MgCl}_2MgCl2.
Magnesium chloride contains the chloride ion, Cl−\text{Cl}^-Cl−.
Give the formula of the magnesium ion in magnesium chloride.
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.