Comment upon the following: rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy and density.

Hint: In order to answer this question one must have to know about the nature of the matter like, solid, liquid and gas. The terms that are given above are viable here, for example, substances can be changed from its strong state to the fluid state and furthermore the reverse way around. The adjustment in fluid state to its fume stage and the reverse way around is likewise possible.

Complete step by step answer:
Now we discuss about the concept of rigidity as,
Rigidity: It is the most grounded power of fascination among particles and this property makes the strong inflexible. Unbending nature gives the ideal shape to solids; the particles in the strong are firmly stuffed. Strong doesn't get twisted effectively by applying additional weight.
Let’s we can see the compressibility as,
Compressibility: Compressibility is generally seen in gases. A great deal of room between particles, a gas can be compacted to a further degree. Solids have the least compressibility and fluids have little compressibility on account of minimal space between their particles.
Now we discuss the concept of fluidity as the capacity to stream is called ease. The less power of fascination and more space between particles make the fluid and gas to stream without any problem. Ease isn't seen in solids.
Now we can discuss about the filling of a gas as,
Filling of a gas: Fluids don't fill a gas holder totally, however gases fill the gas compartment totally in which it is put away. A gas can move in all the bearings thus it fills the holder totally.
Now we can discuss about the shape,
We have to remember that the solids have a fixed shape. Fluid and gas possess the state of the compartment where they are put away. This is because of the less power of fascination and more dynamic energy between the particles of fluids and the unimportant power of fascination and most elevated active energy between particles of gas.
We have to remember that the kinetic energy of particles of strength is the base. They just vibrate at their fixed position. The motor energy of particles of fluid is more when contrasted with strong. Be that as it may, they can slide over each other. The dynamic energy of particles in a gas is greatest.
We have to remember that the density is characterized as the mass per unit volume of a substance. The thickness of strong is most noteworthy, at that point comes fluid, and last comes the gases.

Note: The reverse term of rigidity is fluidity and also we know that the kinetic energy depends on the temperature thus increase in temperature, the kinetic energy of the particle also increases. In this section we discussed the three natures of matter but at high conditions two states exist that are plasma and bose-einstein condensate.