| Property | SOLIDS | LIQUIDS | GASES | 
| Rigidity | Solids are rigid | Liquids are not so rigid | Gases are not at all rigid | 
| Particle arrangement | The particles are closely bound | The particles are not closely bound | The particles are further apart as compared to solids and liquids | 
| Shape | Solids have a definite shape | Liquids take the shape of the container they are poured in | Gases take the shape of the space they occupy | 
| Volume | They have a definite volume | They also have a definite volume | They do not have a definite volume | 
| Compressibility | Particles cannot be compressed easily | Particles can be compressed but not as easily as gases | Particles can be compressed easily | 
| Space occupied | The occupy space with respect to their size | They do not fill the container completely due to relatively high density and close proximity of particles | They fill the entire space they are enclosed in | 
| Kinetic energy | Solids have low kinetic energy | Liquids have intermediate kinetic energy | Gases possess high kinetic energy | 
| Fluidity | Solids cannot flow | Liquids can flow easily | Gases flow easily | 
| Diffusion rate | The diffusion rate is very low | Liquids possess moderate diffusion are | The diffusion rate in the very high | 
| Examples | Eg. Salt, Iron, Brick | Eg. Water, Milk, Honey | Eg. Oxygen, Hydrogen, Nitrogen | 
  
 
