Solids, liquids and gases. In a solid like this brick, the particles are regularly arranged touching their neighbours and move only by vibrating. This explains why solids have a fixed shape. In a ...

Molecules in a gas are more widely dispersed, freely moving around without obstructing one another. In a liquid, however, they rub up against each other, and in a solid they are so packed together ...

American Chemical Society: Chemistry for Life.About this Lesson You may be able to complete this lesson in less than 1 class period. If you think this will be the case, you can move on to Lesson 2, ...

American Chemical Society: Chemistry for Life.As energy is added, the motion of the molecules increases and begins to overcome the attractions that molecules have for one another. If enough energy is ...

The four fundamental states of matter are solid, liquid, gas and plasma, but there others, such as Bose-Einstein condensates and time crystals, that are man-made.