Core
- Describe the general physical and chemical properties of metals
- Explain why metals are often used in the form of alloys
- Identify representations of alloys from diagrams of structure
- Place in order of reactivity: potassium, sodium, calcium, magnesium, zinc, iron, (hydrogen) and copper, by reference to the reactions, if any, of the metals with
- – water or steam
- – dilute hydrochloric acid
and the reduction of their oxides with carbon
- Deduce an order of reactivity from a given set of experimental results
- Describe the ease in obtaining metals from their ores by relating the elements to the reactivity series
- Describe the essential reactions in the extraction of iron from hematite
- Describe the conversion of iron into steel using basic oxides and oxygen
- Name the uses of aluminium:
-
- – in the manufacture of aircraft because of its strength and low density
- – in food containers because of its resistance to corrosion
- – in the manufacture of aircraft because of its strength and low density
- Describe the idea of changing the properties of iron by the controlled use of additives to form steel alloys
- Name the uses of mild steel (car bodies and mac
-
- Deduce an order of reactivity from a given set of experimental results
- – water or steam
Supplement
• Describe the reactivity series as related to the tendency of a metal to form its positive ion, illustrated by its reaction, if any, with
– the aqueous ions
– theoxides
of the other listed metals
– the aqueous ions
– theoxides
of the other listed metals
- Describe the action of heat on the hydroxides and nitrates of the listed metals
- Account for the apparent unreactivity of aluminium in terms of the oxide layer which adheres to the metal
- Describe in outline, the extraction of zinc from zinc blende
- Name the main ore of aluminium as bauxite (see section 5)
- Name the uses of zinc for galvanising and for making brass
- Name the uses of copper related to its properties (electrical wiring and in cooking utensils)
- Describe in outline, the extraction of zinc from zinc blende