Here's why:
* Density is mass per unit volume.
* Gas particles are spread far apart. This means a given volume of gas contains much less mass compared to the same volume of liquid or solid.
Think of it like this: Imagine a room filled with balloons. The balloons are like gas particles. They are spread out and there's a lot of empty space between them. Now imagine trying to squeeze all those balloons into a much smaller space. The balloons would be much closer together, increasing the density.
In summary: The low density of gases is a direct consequence of the significant distances between gas particles.
