It's not entirely accurate to say that liquids and gases are *not* good conductors. It's more accurate to say they are generally poorer conductors than solids, with some important exceptions. Here's why:

1. Particle Spacing:

* Solids: Atoms and molecules in solids are tightly packed, allowing for easy transfer of charge through a network of interacting electrons.

* Liquids and Gases: Particles are more spread out. In liquids, while they are closer than in gases, they have more freedom to move around. This distance makes it more difficult for charge carriers (electrons) to "hop" from one particle to the next.

2. Free Electrons:

* Solids: Some solids, particularly metals, have free electrons that can easily move throughout the material. These electrons act as charge carriers, making them excellent conductors.

* Liquids and Gases: Most liquids and gases don't have a large number of free electrons. In some cases, they may have ions that can carry charge, but these are usually less mobile than free electrons.

Exceptions:

* Electrolytes: Some liquids, called electrolytes, are good conductors because they contain dissolved ions that can move freely and carry electric current. Examples include salt water, battery acid, and molten salts.

* Plasmas: Gases that have been ionized (atoms have lost or gained electrons) become highly conductive. This is because the free electrons and ions in a plasma can move easily and carry charge.

In summary:

While many liquids and gases are poor conductors compared to solids, the conductivity of a material depends on its specific composition and properties. Some liquids and gases can be excellent conductors, particularly those with free charge carriers (electrons or ions).