There are lots of different substances but only just over a hundred elements. An element is a substance that is made up of only one kind of atom. The atoms in a particular element are the same as each ...

In everyday life, for example on food packaging, the word ‘pure’ usually means that something is in its natural state without anything added to it, like sweeteners or preservatives. Natural fruit ...

Mixtures: Have you ever noticed the word ‘pure’ written on the packs of milk? For a layman, it means that it is not adulterated. However, in scientific terms, milk is actually a mixture of various ...