How can we use models to classify states of matter and the changes it undergoes

Matter can exist in one of three main states: solid, liquid, or gas.

Solid matter is composed of tightly packed particles.

Liquid matter is made of more loosely packed particles.

Gaseous matter is composed of particles packed so loosely that it has neither a defined shape nor a defined volume.

Explanation:

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of c is as shown here in the image.

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.