3.4—Ionic crystals as giant lattices of ions

Be able to describe ionic crystals as giant lattices of ions.

Use —ionic crystals as giant lattices of ions to connect the rule to the data and decision in the question.

This matters because —ionic crystals as giant lattices of ions determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —ionic crystals as giant lattices of ions to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —Ionic crystals as giant lattices of ions is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.