Whatever you are looking at now, whatever you are using at this moment, in fact you yourself all involve atoms and molecules . These are the building blocks to life and everything in it. You cannot see the atom, only the results of it. Atoms exist in the tiniest speck of dust. In that tiny speck are millions and millions of them.
A mind boggling concept. Even the air that we breathe is made up of atoms and molecules. It doesent matter if we use it for practical reasons like the Vacuum Conveying system available from https://www.aptech.uk.com/pneumatic-conveying-systems/vacuum-conveying/ to the inflation of a paddling pool. Everything has atoms. The type and make up of a substances that contain atoms and molecules varies. For example, Iron has one type of molecule in its make up whereas water has several types of molecules that combine to create. These are two Hydrogen molecules and one Oxygen.
We can see the molecular structure of all the elements and substances that we know of on the periodic table. Something that all prospective Scientists have to memorise. All atoms are created with the beginning of the universe, namely the Big Bang. However, other theories of creation are available!