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A metal ore is a rock containing enough metal compound to make extraction worthwhile, and the method depends on reactivity. 11 questions answered.
How metals are found and extracted is part of Reactivity of metals in GCSE AQA Higher Chemistry.
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A metal ore is a rock containing enough metal compound to make extraction worthwhile, and the method depends on reactivity. 11 questions answered.
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Use this lesson to stay inside Reactivity of metals while connecting the detail back to the wider Topic 4: Chemical changes topic.
Read the core explanations from How metals are found and extracted before testing yourself from memory.
Walk into any jewellery shop and you'll see gold gleaming in its pure, metallic form. But try finding iron or aluminium like this in nature — you won't. Most metals are far too reactive to exist as pure elements.
Reactive metals desperately want to bond with other elements, especially oxygen. Over millions of years, they've formed stable compounds called ores. Think of an ore as nature's safe — it locks the metal away until we figure out how to break it free.
The key insight here is simple: the more reactive a metal, the more tightly it's bound in its compound. This determines everything about how we extract it.
Not all metals are equally reactive. The reactivity series ranks them from most reactive (potassium) to least reactive (platinum). This ranking is your roadmap for extraction methods.
The key dividing line is carbon. Metals below carbon in the reactivity series can be extracted using carbon. Metals above carbon need more extreme methods like electrolysis.
Here's the practical rule: if a metal is less reactive than carbon, carbon can steal oxygen from its oxide. If it's more reactive than carbon, carbon isn't strong enough — you need electrolysis.
Gold, silver, and platinum are the aristocrats of the metal world. They're so unreactive that they exist naturally as pure metals — we call these native metals.
This is why gold has been prized throughout history — you can literally pick it up from a riverbed and it's ready to use. No complex chemistry required. The ancient Egyptians had gold jewellery but no aluminium, even though aluminium is far more abundant on Earth.
The irony? The most reactive metals (like aluminium) are often the most abundant, but they were the last to be discovered because they're so hard to extract from their compounds.
For metals less reactive than carbon, we use a process called reduction. Carbon acts like a chemical thief, stealing oxygen from metal oxides and setting the metal free.
Worked example: Carbon Reduction of Iron Oxide
Show how carbon extracts iron from iron oxide ($Fe_2O_3$).
Answer: $2Fe_2O_3(s) + 3C(s) \rightarrow 4Fe(l) + 3CO_2(g)$
The key insight: Carbon doesn't just remove oxygen — it actually wants the oxygen more than the metal does. This is why the method only works for metals less reactive than carbon.
Now you can predict any metal's extraction method using this simple hierarchy:
Most reactive metals (K, Na, Li, Ca, Mg, Al): Need electrolysis — carbon isn't strong enough to steal their oxygen.
Moderately reactive metals (Zn, Fe, Sn, Pb): Use carbon reduction — carbon can outcompete them for oxygen.
Unreactive metals (Cu, Ag, Au, Pt): Found native or easily reduced — they barely hold onto oxygen anyway.
Extraction questions often trip students up because they confuse reactivity with abundance or cost. Here's how to nail these questions every time.
Common exam trap: Questions asking why aluminium was discovered late despite being abundant. The answer isn't about rarity — it's about reactivity making extraction difficult.
Exam precision note: In How metals are found and extracted - Extraction of metals and reduction - Reactivity of metals, always identify the key chemical idea first, then link it to evidence, data, or an equation. A high-scoring GCSE answer names the particles involved, states what changes, and justifies the conclusion using correct scientific language. Where calculations are used, show each step with units and keep significant figures sensible. Finally, check that terminology matches AQA wording so your answer is unambiguous and mark-scheme friendly.
Extraction method depends on how reactive the metal is. Metals below carbon in the reactivity series can be extracted by reduction with carbon, but metals above carbon usually need electrolysis because carbon is not reactive enough to remove the metal from its compound.
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Move to the related lessons or back to the topic page when you need the wider sequence before exam-style practice.
Haematite is iron ore, the rock that contains iron oxide, Fe₂O₃. Iron is too reactive to exist as a pure element, so it is extracted from haematite by reduction with carbon, since iron is less reactive than carbon.
Bauxite is aluminium ore, which contains aluminium oxide, Al₂O₃. Aluminium is more reactive than carbon, so it can't be extracted from bauxite using carbon and needs electrolysis instead.
A metal ore is a rock containing enough metal compound to make extraction economically worthwhile. Examples include iron ore (haematite, Fe₂O₃) and aluminium ore (bauxite, Al₂O₃).
The extraction method depends on how reactive the metal is. The most reactive metals (K, Na, Li, Ca, Mg, Al) need electrolysis, moderately reactive metals (Zn, Fe, Sn, Pb) are reduced with carbon, and unreactive metals (Cu, Ag, Au, Pt) are found native or easily reduced.
A native metal is a metal found naturally in its pure form rather than as a compound. Only the least reactive metals, such as gold, silver and platinum, exist as native metals because they do not readily react with oxygen or other elements.
The most reactive metals, K, Na, Li, Ca, Mg and Al, are extracted by electrolysis. These metals are more reactive than carbon, so carbon isn't strong enough to remove oxygen from their compounds.
Most metals are found as compounds because they are too reactive to exist as pure elements; over millions of years they have bonded with other elements, especially oxygen, to form ores. The more reactive a metal, the more tightly it is bound in its compound.
Metals less reactive than carbon, such as zinc, iron, tin and lead, can be extracted by reduction with carbon. Metals more reactive than carbon, such as potassium, sodium and aluminium, need electrolysis because carbon is not reactive enough to remove the metal from its compound.
Aluminium was discovered late, despite being far more abundant than gold, because it is very reactive and so is hard to extract from its compounds. The reason is reactivity making extraction difficult, not rarity.
Zinc, iron, tin and lead can be extracted by reduction with carbon because they are less reactive than carbon. Carbon removes oxygen from their oxides and is itself oxidised to carbon dioxide, leaving the pure metal behind.
The most reactive metals, like aluminium, are often the most abundant, but they were the last to be discovered because they are so hard to extract from their compounds. The ancient Egyptians had gold jewellery but no aluminium, even though aluminium is far more abundant.