Your question is very muddled but I think the answer you are after is 'density'.
Solid
gas
matter with no definite shape or volume is fluid, or any substance that is able to flow.
A solid has a definite shape and volume A liquid has the shape of the container and a definite volume A gas has the shape and volume of the container so the two characteristics for the substance to be solid are: a definite shape a definite volume
gases have no shape,volume water has volume but no shape solids have shape and volume gases have the most intermolecular space solids have least inter molecular space <><><><><> Temperature and pressure.
Solid
the solid state
Solid
the solid state
Gas.
the solid state
This is a good working description of the gaseous phase of matter. A sample of gas will assume the shape and volume of its container, so the sample has no shape or volume of its own.
Solid
density
gas
Solid
A solid is a substance that has a fixed volume and a fixed shape, and a liquid has a fixed volume but not a fixed shape, and a gas has no fixed volume or shape.