The word 'pure' is used in chemistry in a different way from its everyday meaning. For example, shops sell cartons labelled as ‘pure' orange juice. The label means that the contents are just orange ...

Everything we can see and touch, and quite a lot that we can’t as well, is made of tiny particles called atoms. Some substances, like particles of this iron, contain only one kind of atom. Iron is an ...

Students are introduced to the distinctive properties of mixtures and solutions. Students are introduced to the distinctive properties of mixtures and solutions, and watch a demonstration. Created by ...