If I have Avogadro number of these things in a long line, you can bet it is going to be a solid.
Avogadro was a professor of chemistry at the University of Turin who did a lot of work on gas laws, understanding the number of gas particles in a given volume at a given temperature.
Avogadro disposed of this discrepancy by introducing a new conception: the molecule.
The Avogadro Constant: the Unit and the Scaling Factor