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.
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.
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
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.