Structure and Properties of solid, liquid and ga ...

They do not have a fixed shape. They change their shape depending on the container they are in

They occupy a fixed volume

The molecules are widely separated from one another

They have a fixed shape

The molecules vibrate and they can move around each other freely.

The molecules are strongly attracted to one another

Less attraction between molecules

No force of attraction between molecules

The molecules are packed slightly less closely together

They spread out/expand and change their volume to fill up whatever container they are in.

The molecules are vibrates about a fixed position but they cannot move pass one another

Molecules are free to move and sometimes collide with each other

The molecules are packed closely together

Even when they change their shape, they always take up the same amount of space. Their volume stays the same