Why do we use this metal and not that one? Every choice is chemistry.
🔎 The Detective's Brief
Imagine you are the chief materials engineer at a global manufacturing company. Your boss walks in and slams two orders on your desk: build a passenger jet and wire up a skyscraper. You have a warehouse full of metals. Which do you pick — and why? The wrong choice costs billions, and could kill people. Welcome to the world of applied chemistry.
Click a metal to open its engineering dossier. Then hover over its applications.
⚠️ EXAMINER TRAP
Students often write "aluminium is used in overhead cables because it is a good conductor." This earns 1 mark, not 2. You must also state its low density — copper is also a better conductor, but would be too heavy. Always give two properties for any application question.
📌 Cambridge Keyword Summary
Aluminium — Aircraft
Low density
Aluminium — Cables
Low density + electrical conductivity
Aluminium — Food cans
Resistance to corrosion (oxide layer)
Copper — Electrical wiring
Good electrical conductivity + ductility
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