Atoms, Elements, Compounds and Mixtures
Everything in the world is made up of atoms, which are tiny particles. However,
all atoms are not the same. They will be different depending on which element
they make up.
For example, all of the atoms of chlorine will be the same as each other, but
they will be different to the atoms of helium.
Compounds are structures that are made up of atoms from different elements.
Water is a compound, made of 2 hydrogen atoms and 1 oxygen atom.
Compounds are chemically bonded together, so it is very difficult to separate
the different elements.