__ is the second most abundant element after aluminium.
In the extraction iron from haematite, the ore is first roasted in air to remove:
The extraction of metals by chemical reduction uses suitable reducing agents such as:
Select a group containing only very reactive metals.
Iron is used in the construction of roads, bridges and buildings because of:
It is hard and malleable.
Its magnetic properties.
Its hardness.
It high tensile strength.
