Explain the physical properties of ionic compounds using lattice structure.

In the subtopic Ionic bonding, this AQA A-Level Chemistry 7405 learning objective focuses on explain the physical properties of ionic compounds using lattice structure. It belongs to Bonding, so revision should stay anchored to this exact subtopic rather than drifting into a generic GCSE-level chemistry summary. Approved keywords to use include ion, lattice. Ionic bond. means the electrostatic attraction between oppositely charged ions in an ionic compound Avoid the mistake of students often confuse the strength of ionic lattices with the size of the ions alone, neglecting the effect of charge; instead, to correctly explain ionic lattice strength, remember that it is influenced by both the charge of the ions and their ionic radii. Use the formula for lattice energy, which indicates that higher charges lead to stronger attractions. For example, when comparing NaCl and MgO, MgO has a higher lattice energy due to the +2 charge on Mg compared to the +1 charge on Na. Therefore, the ionic lattice strength increases with higher ionic charges and smaller ionic radii For exam answers, when explaining the physical properties of ionic compounds, always relate them back to the ionic lattice structure. Discuss how the strength of the ionic bonds affects properties like melting point and solubility