In gases and liquids, particles have lots of space and can move freely unlike solids where their particles are close together and are slightly vibrating. Solids have a fixed shape and volume whereas liquids and gases take the shape of their container. For gases, they have no definite volume but for a liquid, they do.
Remember that pure substances are substances that are only made up of one atom or molecule.
Yeah, and different substances are made up of different particles.
Aren't all particles in a pure substance the same?
So basically like water.
Yup! Solid particles attractive force is high, gases are low and liquids are medium. You know, because solid are high so there particles are packed but gases are far apart.
Lastly, just remember that the particles of a substance are attracted to one another.
So the strength of the attractive force depends on the type of particle?
OKAY STOP TALKING NOW, WE ARE GOING TO START THE TEST!