Here's how the particle model applies to different substances:
* Solids: Particles in solids are closely packed together and vibrate in fixed positions. They have a definite shape and volume. Examples include ice, rocks, and metals.
* Liquids: Particles in liquids are closer together than gases but can move around each other. They have a definite volume but take the shape of their container. Examples include water, oil, and mercury.
* Gases: Particles in gases are far apart and move freely in all directions. They have no definite shape or volume and easily compress. Examples include air, oxygen, and nitrogen.
Therefore, all substances follow the particle model, including:
* Elements: Pure substances made up of only one type of atom (e.g., gold, oxygen, carbon).
* Compounds: Substances made up of two or more different elements chemically bonded together (e.g., water, salt, sugar).
* Mixtures: Combinations of two or more substances that are not chemically bonded (e.g., salt and pepper, air, sand and water).
In short, the particle model is a fundamental concept that applies to all matter, regardless of its physical state or chemical composition.
