3.20—Metals consist of giant lattices of metal ions in a sea of delocalised electrons

Understand that metals consist of giant lattices of metal ions in a sea of delocalised electrons.

Use —metals consist of giant lattices of metal ions in a sea of delocalised electrons to connect the rule to the data and decision in the question.

This matters because —metals consist of giant lattices of metal ions in a sea of delocalised electrons determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —metals consist of giant lattices of metal ions in a sea of delocalised electrons to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —Metals consist of giant lattices of metal ions in a sea of delocalised electrons is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.