On Wed, 11 Oct 2017 23:19:39 -0700 (PDT), StarDust
wrote:
Empty space and mass 2 different things! Atoms have mass,
proton/neutron, atomic weight, but their size is soooo small compare
to the size of atom, that atom is empty space.
Some one compared atoms are like soap bubbles stick to gather.
https://www.youtube.com/watch?v=yqLlgIaz1L0

Atoms are mostly, but not completely, empty space. The nucleus of an
atom, compared to its shell of electrons, is like a fly flying in the
middle of a cathedral. But the matter in the nucleus is super dense,
like a neutron star - you cannot ignore that!