My Dad told me a story about a guy in his town in the 1950s drove to the bar and left his kid in the car. After an hour or 2 the kid gets bored and starts playing with the cigarette lighter. After a while it got too hot to hold down so he used his foot and the car started on fire and burnt to the ground.
The ratio of matter (nucleus + electrons) to the total volume of an atom is on the order of 1 to 1 trillion or even less, depending on the atom. This means that over 99.9999999999% of an atom is empty space.
This mind-boggling emptiness is why solid objects feel solid to us despite being made of atoms—it's the forces between atoms (like electrostatic repulsion) that give matter its structure, not the physical "stuff" filling the space.
We and all matter are really just mostly empty space and electrical energy.