How do you get to 0?

Actually, technically your body is 99.999% empty space. The nucleus of an atom is 10^-13 CM wide, while the electron cloud is 10^-8 cm. In other words, an atom is 5 times the size of the nucleus.

You're not actually sitting in your chair right now. The forces of repulsion created when electrons get close is causing you to hover very slightly above your chair.

There's only one time when the nuclei of atoms touch. It's called fusion

So you basically just said the exact same thing as me lol. Except fusion isntead of fission, whoopsy my bad.