Gases are highly compressible substances with molecules separated by large spaces compared to solids and liquids.
When a substance containing neutral atoms can be compressed significantly, with atoms moving closer together and the space between them decreasing, it is most likely a gas. Gases differ from solids and liquids in that their molecules are mostly separated by large spaces, leading to high compressibility and the ability to move freely throughout the entire volume of their container.
https://brainly.com/question/25977123