Pure and Mixed Substances: In the world of chemistry, substances are broadly classified into two fundamental categories: pure and mixed substances. Understanding these distinctions is crucial as they ...

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 a sample of impure salol (salol mixed with other substances), the temperature falls gradually as it freezes. We can use these differences between melting and boiling points to distinguish between ...