Lets get to the heart of the matter.
You are matter, your shoes are matter, your feet are matter, everything you can see and touch are materialized substances.
An atom is part of the invisible world that makes up all the visible material stuff and things. So the atom, what you don't see, is what makes up everything you do see.
The electron is inside the atom and is a subatomic particle. And a particle is a tiny, tiny, tiny portion of matter. Matter is what makes up the whole material world.
A sub-atomic particle is something even smaller than the atom and that is why it is called sub-atom-ic.
Sub tells us that this is something smaller, or something going inside, going deeper into a level, or a smaller part of a thing. Such as a sub-marine goes deeper in water than a ship on the surface waters. It gets submerged as it goes into water. Subterranean caves are below the surface of the earth, or inside the earth. Subconscious is...
So it all works like this.
1. Matter- that stuff that takes up space and can be seen, touched, tasted, heard
2. Molecules- a group of atoms held together by a force of electrical charge
3. Atoms- particles of matter, all the invisible pieces
4. Subatomic particles- particles of the atom, such as the electrons
So as you can see, molecules are sub matter, atoms are sub molecule, particles are subatomic.
In the physical material world there is solid stuff like the rocks, liquid stuff like the water, and gaseous stuff like the air. All of these are made from invisible molecules, atoms and subatomic particles.
The electron also isn't alone inside the atom. It has family and friends called protons and neutrons that hang out there too.
And ...there is electricity which some might say is the secret power. There is also something called the Field. The Higgs Field maybe holds everything together. We can talk about all that later.