Unreactive gas comprising almost 80% of air.

Metal used to build ships, bridges and vehicles.

Unreactive gas with such a low density it is used to fill balloons to make them lighter than air.

This element has two common allotropes, diamond and graphite.

Yellow solid with an oxide which is the chief cause of acid rain.

Grey solid halogen.

Liquid metal (at room conditions).

Unreactive metal with a water soluble sulphate which forms blue diamond shaped crystals.

Reactive metal with a carbonate composing over 90% of limestone.

Metal used to galvanise steel.