chemistry unit 5.2
All matter is made up of tiny particles.
These particles are much too small to see
These particles are arranged differently in solids , liquids and gases.
Solids
In solids the particles are arranged in a fixed pattern.
The particles are held together strongly and are tightly packed.
This is why solids have a fixed shape.
The particles in a solid can vibrate but they stay in the same place.
Liquids
In liquids the particles touch each other.
The particles can move past one another but they remain touching one another.
Liquids can change shape.
Gases
In gases the particles touch each other .
They are a long way apart .
The particles can spread out by themselves.
Gases can change shape.
