States of Matter and Particle Behaviour
The three states of matter - solids, liquids, and gases - all depend on how particles move and arrange themselves. In solids, particles vibrate in fixed positions with low kinetic energy, creating regular patterns that give solids their fixed shape.
Liquids have randomly arranged particles that can move around each other with higher kinetic energy. This allows liquids to flow and take the shape of their container, but they still can't be compressed because particles remain close together.
Gases have particles with the highest kinetic energy, moving freely and randomly. The particle model helps us visualise these arrangements, but remember it has limitations - it doesn't show chemical bonds, and real particles aren't solid spheres like the diagrams suggest.
Quick Tip: Remember the state symbols for equations: solid, liquid, gas, and (aq) aqueous (dissolved in water).
