Someone on Yahoo Answers who claims (s)he has a physics background wrote that solidity is only an illusion, because there are so many atoms, and we would see that atoms are mostly space at the sub-nanometric scale. (S)he also wrote that there is 'no solid, no liquid and no gas. There are only atoms and atoms are mostly empty space with nucleus of protons and neutrons and electron clouds.'
It's just that I thought that the bonds between atoms/molecules determine whether they are solids, liquids, or gases: independent atoms/molecules with no bonds for gases, Van der Waals or weaker interactions to keep atoms/molecules together for liquids, and stronger, cohesive bonds in solids.
Who's right?