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 ...

A metal-containing compound that transforms into a solid when exposed to light and returns to liquid form when heated has been developed by researchers. This substance could potentially be used for ...