2. Aluminium
It is a metal with a low density which means it is lightweight for its size
Aluminium is used for aircraft, trains, overhead power cables, saucepans and cooking foil.

3. General Lightweight, low density Strong, Malleable
Good conductor of heat and electricity
It cannot be extracted by reduction
resist corrosion
Extraction is expensive because there are several stages involved and the processes require a lot of energy

4. Green Metal, more expensive than Gold and Silver
More than 75% of produced Aluminium remain in production recycle proccess
Abundant metal and third element on earth
Up to 18th era it was more expensive than silver even Gold due to costly extraction

5. Aluminium resists corrosion as it has a very thin layer of its oxides on the surface, which stops air and water getting to the metal

6. Extraction of metals
Only some unreactive metals such as silver, gold and platinum can occur freely in nature. Most metals react with other elements to form ores.

7. Extraction
Unlike iron, aluminium cannot be
extracted from their oxides by reduction with carbon because:
It is more reactive than carbon, so the reaction does not work

8. Aluminium Ore Aluminum Ore is called Bauxite
Chemical Formula for Aluminium Oxide?
AL2O3

9. The extraction of Aluminium
Al3+ is attracted to the negative cathode
O2- is attracted to the positive anode
At the cathode,
Al3+ gains 3 electrons from the cathode to
form molten aluminium, which is tapped off
Al3+(l) + 3e-  Al (l)
At the anode,
O2- loses 2 electrons to the anode to form oxygen
2O2-(l)  O2(g) + 4e-
Oxygen released attacks carbon anode, to form Carbon monoxide/dioxide. Carbon anode dissolved. Needs to be replaced regularly

11. Uses of Aluminium Uses Properties Overhead electric cables
Low density, light
Resistant to corrosion (protected by aluminium oxide)
Good electrical conductivity
Food containers
Non-toxic
Resistant to corrosion
Good conductor of heat
Aircraft body
High tensile strength
Construction Industry
light, Resistant to corrosion