1. What is an ore?
Why do we have to use chemical reactions to extract most metals?
What is the name given to the group of metals in the centre of the periodic table?
What is meant by reduction?
What is an alloy?
What does it mean if a metal is found native? Give an example.
C1.3 Metals
and their uses
Write word and symbol equations for the reduction of iron oxide.
Why are aluminum and titanium expensive to extract? .
Give two problems with the extraction of copper.
Give two reasons for recycling metals
Why must compounds be molten for electrolysis to work?
Why is iron from the blast furnace limited in terms of usefulness?
Name two novel methods of extracting copper and describe each.
What is electrolysis?
Why can’t aluminium be extracted by reduction with carbon?
What element is used to reduce metal oxides?
Explain why copper can be extracted using scrap iron.
Why are metals such as copper and gold normally made into alloys?
What properties of copper make it useful for:
Piping?
Electrical wiring?
Draw a labeled diagram to show the structure of steel.
Give a property of
Low carbon steels:
High carbon steels:
Stainless steels:
What two things are metals good at conducting?
What properties of aluminium and titanium make them useful?
Why is electrolysis so expensive?

2. What is an ore?
A naturally occurring rock that contains enough metal to make it economic to extract.
Why do we have to use chemical reactions to extract most metals?
They are reactive so are found in the crust as compounds.
What is the name given to the group of metals in the centre of the periodic table?
Transition metals
What is meant by reduction?
The removal of oxygen
What is an alloy?
Mixture of a metal with other elements
What does it mean if a metal is found native? Give an example.
Metal found as it’s element e.g Gold
C1.3 Metals
and their uses
Write word and symbol equations for the reduction of iron oxide.
Iron Carbon Iron + Carbon
oxide dioxide
2Fe2O3 +3 C 4Fe + 3 CO2
Why are aluminum and titanium expensive to extract?
there are many stages in the processes
large amounts of energy are needed.
Give two problems with the extraction of copper.
Copper rich ores are becoming scarce
Mining and extraction cause major environmental problems
Give two reasons for recycling metals
Extracting them uses up limited resources
Extraction requires large amounts of energy
Extraction is harmful for the environment
Why must compounds be molten for electrolysis to work?
So the positive metal ions are free to move to the negative electrode
Why is iron from the blast furnace limited in terms of usefulness?
It contains about 4% carbon so is brittle
Name two novel methods of extracting copper and describe each.
Phytomining - plants absorb the metal compounds; plants then burned to produce ash to release metal compounds
Bioleaching – uses bacteria to produce a leachate from which metal can be extracted
What is electrolysis?
Using electricity to remove a metal from its ore.
Why can’t aluminium be extracted by reduction with carbon?
Aluminium is more reactive than carbon
What element is used to reduce metal oxides?
Carbon
Explain why copper can be extracted using scrap iron.
Iron is more reactive than copper so displaces it from its salt.
Why are metals such as copper and gold normally made into alloys?
They are too soft to use in their pure form
What properties of copper make it useful for:
Piping? Resistant too corrosion; hard but easy to shape
Electrical wiring? Ductile; good conductor of electricity
Draw a labeled diagram to show the structure of steel.
Give a property of
Low carbon steels: malleable
High carbon steels: hard
Stainless steels: resistant to corrosion
carbon
iron
What two things are metals good at conducting?
Heat
Electricity
What properties of aluminium and titanium make them useful?
Low density
Resistant to corrosion
Why is electrolysis so expensive?
It uses large amounts of energy